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caption string | objects list | qa_pairs list | image string |
|---|---|---|---|
This SAR image shows a mostly dark background with a bright linear feature running nearly vertically through the center, resembling a runway or straight transportation corridor. Along this bright strip, numerous small reflective points appear in two main clusters, one in the upper half and one in the lower half of the image. In the bottom-right portion of the scene, a medium-sized aircraft is located just to the right of the bright linear feature, standing out as a compact bright shape among the nearby point-like reflections. Additional scattered bright spots lie near the linear structure, suggesting multiple objects arranged along its length. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized aircraft is located in the bottom-right area of the image, positioned just to the right of the central bright linear feature and appearing as a compact bright shape among surrounding point-like reflections.",
"obj_cls": "aircraft",
"obj_corner": [... | [
{
"ques_id": 0,
"question": "What is the main man-made linear structure running nearly vertically through the center of the image likely to represent?",
"type": "scene type",
"answer": "runway"
},
{
"ques_id": 1,
"question": "How many aircraft are annotated in this image?",
"type": "... | 0000001.jpg |
This SAR image shows a harbor area with two main harbor regions composed of bright linear and clustered reflections against a darker water background. A medium-sized harbor zone occupies the upper-left portion of the image, with dense bright structures and pier-like lines extending diagonally. A larger harbor region stretches from the central area toward the lower-right, featuring more extensive bright patterns and elongated linear features, suggesting a more developed waterfront. Darker zones between these bright structures likely indicate open water or less built-up areas within the harbor complex. | [] | [
{
"ques_id": 0,
"question": "How many harbor regions are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "Where is the medium-sized harbor region mainly located in the image?",
"type": "object position",
"answer": "upper-left"
}... | 0000002.png |
This SAR image shows a mostly dark background with a single bright medium-sized ship near the upper-central area. The ship appears as an elongated bright cluster standing out clearly against the surrounding low-intensity region, which suggests open water or a similar uniform surface. No other distinct large objects are visible around the ship in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized elongated bright ship is located near the upper center of the image, standing out clearly against the dark surrounding area.",
"obj_cls": "ship",
"obj_corner": [
0.59375,
0.25,
0.8203125,
0.25,
0.8203125,
0.3085... | [
{
"ques_id": 0,
"question": "What is the main object visible near the upper center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000003.jpg |
This SAR image shows a dark background with three medium-sized aircraft appearing as bright rectangular targets, mainly distributed across the central and right portions of the scene. One aircraft is located toward the left-central area, while two other aircraft are grouped on the right side, one higher and one lower. The aircraft on the right display stronger and more extended bright responses, making them stand out against the darker surroundings. The rest of the scene appears mostly featureless and dark, with no clearly discernible roads, buildings, or water bodies. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized aircraft located near the center-left of the image appears as a bright, compact rectangular target separated from the brighter pair of aircraft on the right side.",
"obj_cls": "aircraft",
"obj_corner": [
0.271484375,
0.486328125,
... | [
{
"ques_id": 0,
"question": "How many aircraft are visible in the image?",
"type": "object_quantity",
"answer": "three"
},
{
"ques_id": 1,
"question": "What is the main category of objects highlighted in this SAR image?",
"type": "object_category",
"answer": "aircraft"
},
{
... | 0000005.jpg |
The SAR image shows a dark background filled with fine speckle noise and a single bright cross-shaped feature near the center. At the intersection of the vertical and horizontal bright streaks, there is a medium-sized, intensely reflective ship-like target located slightly below the middle of the image. The strong linear streaks extend vertically and horizontally from this central bright object, standing out sharply from the surrounding low-intensity texture. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized, very bright ship target is located at the center of the image where the vertical and horizontal bright streaks intersect.",
"obj_cls": "ship",
"obj_corner": [
0.36328125,
0.53125,
0.4140625,
0.53125,
0.4140625,
... | [
{
"ques_id": 0,
"question": "What is the main object located at the intersection of the bright vertical and horizontal streaks near the image center?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": ... | 0000008.jpg |
This SAR image shows a mostly dark scene with a single bright medium-sized ship located toward the left side of the frame. The ship appears as a compact cluster of strong reflections extending vertically in the image, standing out clearly against the otherwise featureless dark background. No other distinct objects or structures are visible around the vessel. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized ship made up of bright radar reflections is located along the left side of the image, standing out sharply against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.125,
0.51171875,
0.30859375,
0.51171875,
0... | [
{
"ques_id": 0,
"question": "What is the main object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"ques... | 0000011.jpg |
This SAR image shows a mostly dark water surface with a single bright ship signature on the left side. The medium-sized ship appears as a compact cluster of strong reflections against the otherwise low-backscatter background. No other distinct structures or vessels are visible around it, emphasizing the isolation of this solitary ship in open water. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized ship appears as a bright, compact cluster of reflections along the left edge of the dark water background.",
"obj_cls": "ship",
"obj_corner": [
0.00390625,
0.25390625,
0.1015625,
0.25390625,
0.1015625,
0.... | [
{
"ques_id": 0,
"question": "What is the main man-made object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
... | 0000012.jpg |
This SAR image shows two bright harbor areas separated by a broad dark water region. A larger harbor zone occupies the lower-left portion, forming an irregular band of dense bright linear and point-like scatterers along the water edge. On the lower-right side, a smaller harbor area appears as a compact cluster of bright returns near the water margin. Additional bright scatterers extend toward the upper-right corner, indicating more built-up or structural features around the water body. | [
{
"obj_id": 0,
"referring_sentence": "The larger harbor area forms an extended band of bright linear and point-like reflections along the lower-left edge of the dark water region.",
"obj_cls": "harbor",
"obj_corner": [
0.00390625,
0.66796875,
0.40234375,
0.66796875,
0.4... | [
{
"ques_id": 0,
"question": "How many harbor areas are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "Where is the larger harbor area located relative to the image frame?",
"type": "object position",
"answer": "lower left"
},
... | 0000015.png |
This SAR image shows a mostly dark background with a single bright object located in the lower-left-central area. The object has an elongated, slightly irregular shape and appears as a concentrated cluster of strong radar reflections, standing out clearly from the surrounding noise. Overall, the scene contains one medium-sized ship-like target and no other prominent structures or objects are visible. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized ship is the bright, elongated target situated in the lower-left-central part of the image against the otherwise dark background.",
"obj_cls": "ship",
"obj_corner": [
0.3203125,
0.5390625,
0.48046875,
0.5390625,
... | [
{
"ques_id": 0,
"question": "What is the main object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"ques... | 0000016.jpg |
This SAR image shows a highly textured background with strong granular noise across the scene. Near the bottom-right area, a single medium-sized bright ship stands out clearly against the darker surrounding background. No other distinct large man-made structures or vehicles are visibly separated from the noisy background. | [
{
"obj_id": 0,
"referring_sentence": "The object is the medium-sized bright ship located near the bottom-right edge of the image, clearly separated from the darker textured surroundings.",
"obj_cls": "ship",
"obj_corner": [
0.83203125,
0.8671875,
0.9296875,
0.8671875,
0... | [
{
"ques_id": 0,
"question": "What is the bright object near the bottom-right edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_... | 0000017.jpg |
This SAR image shows a nearly black background with a single bright, medium-sized ship near the central region. The ship appears as an elongated reflective shape against the dark surroundings, making it the most prominent feature in the scene. Faint speckled returns are scattered sparsely across the image, but no other large structured objects are visible. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized bright ship lies near the center of the image, forming an isolated elongated cluster of strong reflections against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.33203125,
0.4453125,
0.3828125,
0.4453125... | [
{
"ques_id": 0,
"question": "What is the main object visible near the center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": ... | 0000019.jpg |
This SAR image shows an urban area bisected diagonally by a dark, linear river or canal running from the lower left toward the upper right. Dense bright speckled patterns on both sides of the waterway indicate many closely packed buildings and streets, forming a complex grid-like layout. Near the bottom-right portion of the image, a medium-sized bright rectangular bridge spans the dark water, connecting the urban areas on both banks. Numerous straight and slightly curved bright lines appear throughout the scene, corresponding to roads aligned with the built-up blocks around the river. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright rectangular bridge crosses the dark river near the bottom-right part of the image, linking the dense built-up areas on both sides of the waterway.",
"obj_cls": "bridge",
"obj_corner": [
0.66015625,
0.83984375,
0.6953125,
... | [
{
"ques_id": 0,
"question": "What major dark feature runs diagonally across the center of the image?",
"type": "object category",
"answer": "river or canal"
},
{
"ques_id": 1,
"question": "What type of structure spans the river near the bottom-right area of the image?",
"type": "obje... | 0000024.png |
This SAR image shows a dark background with scattered bright linear and clustered reflections, indicating man-made structures across the scene. In the middle-right area, a medium-sized aircraft is clearly visible as a bright, compact object among the surrounding speckled returns. Additional bright streaks and patches suggest other structural features or surfaces distributed diagonally across the lower and upper portions of the image. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized aircraft appears as a bright, compact shape located in the middle-right part of the image, standing out from the darker surroundings.",
"obj_cls": "aircraft",
"obj_corner": [
0.732421875,
0.341796875,
0.84765625,
0.341796... | [
{
"ques_id": 0,
"question": "What is the category of the bright medium-sized object in the middle-right of the image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are visible in this SAR image?",
"type": "object quantity",
"a... | 0000025.jpg |
This SAR image shows a predominantly dark background with a single bright medium-sized ship pattern positioned slightly right of center. The ship appears as an elongated horizontal cluster of strong reflections, with a rounded brighter area on its left end and a denser, more compact section toward its right end. Faint vertical streaks of scattered reflections extend above and below the ship, suggesting radar echo artifacts around the main bright target. No other distinct large objects are visible in the surrounding dark area. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized ship appears as a bright horizontal elongated cluster of reflections located slightly right of the image center against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.50390625,
0.6171875,
0.91796875,
0.6... | [
{
"ques_id": 0,
"question": "What is the main object visible as a bright elongated cluster of reflections near the center-right of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object ... | 0000026.jpg |
This SAR image shows a bright, textured landmass occupying the left and lower-left portions of the scene, contrasted against a darker open area on the right. In the bottom-right, a medium-size bright harbor structure extends along the edge of the dark region, with linear, high-intensity features suggesting piers or quays. Numerous bright scatterers densely cover the land area near the harbor, indicating a cluttered surface. The overall composition highlights the boundary between the compact bright land region and the smoother, darker area adjacent to the harbor. | [
{
"obj_id": 0,
"referring_sentence": "The medium-size bright harbor structure is located in the bottom-right of the image along the boundary between the textured land area and the dark open region.",
"obj_cls": "harbor",
"obj_corner": [
0.7734375,
0.6796875,
0.98828125,
0.679... | [
{
"ques_id": 0,
"question": "What major man-made structure is present in the bottom-right of the image?",
"type": "object category",
"answer": "harbor"
},
{
"ques_id": 1,
"question": "Where is the harbor located within the image?",
"type": "object position",
"answer": "bottom-rig... | 0000032.png |
This SAR image shows an urban area with a dense grid of bright, block-shaped structures and intersecting linear features. Near the top of the image, a medium-length bridge spans diagonally across a darker linear corridor, likely crossing over a wide transport route or channel. Below the bridge, numerous rectangular building blocks and narrow straight roads form a regular network of city blocks. Bright scatterers are concentrated near the upper central part of the scene, indicating clusters of closely spaced man‑made structures around the bridge area. | [
{
"obj_id": 0,
"referring_sentence": "A medium-length bridge lies near the top of the scene, cutting diagonally across a dark, elongated corridor that separates brighter urban structures on both sides.",
"obj_cls": "bridge",
"obj_corner": [
0.29296875,
0.015625,
0.3515625,
0.... | [
{
"ques_id": 0,
"question": "What man-made linear structure is located near the top of the image crossing a dark corridor?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in this image?",
"type": "object quantity",
"ans... | 0000035.png |
This SAR image shows a mostly dark background with a single medium-sized bright ship located in the bottom-left corner. The ship appears as a concentrated cluster of strong reflections standing out clearly from the surrounding low-return area, suggesting it is isolated in open water. No other prominent objects or structures are visible in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The only ship in the scene is a medium-sized bright target positioned tightly against the bottom-left corner of the image.",
"obj_cls": "ship",
"obj_corner": [
0,
0.859375,
0.1796875,
0.859375,
0.1796875,
0.99609375,
0,
... | [
{
"ques_id": 0,
"question": "What is the category of the bright object located in the bottom-left corner of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "on... | 0000038.jpg |
This SAR image shows a mostly textured background with a single bright linear structure extending from the top edge to the bottom edge on the right side of the scene. The structure, interpreted as a large bridge, forms a continuous, slightly slanted band of high intensity contrasting with the darker, grainy surroundings. The bridge occupies the right-central to rightmost portion of the image, while the rest of the area appears homogeneous and featureless in comparison. | [
{
"obj_id": 0,
"referring_sentence": "A large bridge forms a bright, continuous vertical band along the right side of the image, stretching from the top edge to the bottom edge against a darker textured background.",
"obj_cls": "bridge",
"obj_corner": [
0.6171875,
0.00390625,
0.917... | [
{
"ques_id": 0,
"question": "What is the prominent linear structure on the right side of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000040.jpg |
This SAR image shows a mostly dark, textured background with a single medium-sized ship located in the middle-left area. The ship appears as a bright, elongated target standing out clearly from the surrounding low-intensity background. No other distinct large objects or structures are visible around the vessel, leaving the rest of the scene relatively uniform. | [
{
"obj_id": 0,
"referring_sentence": "The bright medium-sized ship is located in the middle-left part of the image, appearing as an elongated rectangular target against the darker background.",
"obj_cls": "ship",
"obj_corner": [
0.025390625,
0.5234375,
0.16796875,
0.5234375,
... | [
{
"ques_id": 0,
"question": "What is the category of the bright elongated object in the middle-left of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this image?",
"type": "object quantity",
"answer": "one"
... | 0000041.jpg |
This SAR image shows a mostly dark background with a single bright linear ship target located near the top-left area. The medium-sized ship appears as a compact, elongated cluster of strong radar reflections against the uniform low-backscatter surroundings. No other distinct objects or structures are visible around the ship, leaving the rest of the scene largely empty and homogeneous. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized bright ship lies near the top-left edge of the image, forming a short, elongated streak of strong reflections against the otherwise dark background.",
"obj_cls": "ship",
"obj_corner": [
0.1575,
0.07125,
0.20125,
0.07... | [
{
"ques_id": 0,
"question": "What is the category of the bright elongated target near the top-left of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
}... | 0000042.jpg |
This SAR image shows a dark water surface dotted with six medium-bright ship targets spread across the frame. One ship appears near the top-left, with another bright ship slightly right of center in the upper portion and a similar one toward the upper-right. A single ship lies along the middle-left edge, another bright target is positioned near the bottom-middle, and an additional ship is located on the right side slightly above the image center. The ships vary slightly in size and spacing but all show compact, bright radar returns against the dark background. | [
{
"obj_id": 5,
"referring_sentence": "The smallest ship is located near the top-left part of the image, standing alone away from the other bright targets.",
"obj_cls": "ship",
"obj_corner": [
0.126953125,
0.130859375,
0.18359375,
0.130859375,
0.18359375,
0.2070312... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object_quantity",
"answer": "six"
},
{
"ques_id": 1,
"question": "What object category do all the bright elongated targets in this image belong to?",
"type": "object_category",
"answer": "ships"
},... | 0000044.jpg |
The SAR image shows a mostly dark background with a single bright medium-sized ship located in the top-left area. The ship forms an elongated bright cluster against the dark surroundings, standing out clearly as the only prominent object in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship formed by a bright elongated cluster is located in the top-left part of the image against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.12109375,
0,
0.265625,
0,
0.265625,
0.12890625,
... | [
{
"ques_id": 0,
"question": "What is the main object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"ques... | 0000045.jpg |
This SAR image shows a textured landscape with varied backscatter, suggesting a mostly natural surface with scattered bright point-like returns. A medium-sized linear bridge structure appears near the top-right edge, crossing over a darker narrow feature that resembles a channel or cut in the terrain. Numerous small bright spots are dispersed around the central area, contrasting with the generally mottled gray background. The overall scene is dominated by rough, uneven patterns with the bridge standing out as the main organized man-made structure. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bridge structure is located near the top-right edge of the image, forming a bright short linear bar that spans across a darker narrow strip.",
"obj_cls": "bridge",
"obj_corner": [
0.703125,
0,
0.78515625,
0,
0.78515... | [
{
"ques_id": 0,
"question": "What is the prominent man-made structure near the top-right edge of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in this image?",
"type": "object quantity",
"answer": "one"
}... | 0000046.png |
This SAR image shows a mostly dark background with a single bright object cluster near the upper right edge. The bright cluster corresponds to one medium-sized ship positioned along the right side of the scene. No other distinct objects are visible in the surrounding area, leaving the rest of the image largely empty. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship is the bright elongated object located near the upper right edge of the image against the otherwise dark background.",
"obj_cls": "ship",
"obj_corner": [
0.8515625,
0.22265625,
0.99609375,
0.22265625,
0.9960937... | [
{
"ques_id": 0,
"question": "What is the main object visible near the upper right edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"q... | 0000048.jpg |
This SAR image shows a dark, winding river running roughly from the top-left toward the bottom-right of the scene, bordered by brighter textured terrain on both sides. Along the bottom-right section of the river, a single medium-sized, bright rectangular bridge spans the dark water channel, clearly connecting the riverbanks. The surrounding land displays varying backscatter intensities that form mottled patterns, indicating different surface textures on either side of the river. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright rectangular bridge spans the dark river near the bottom-right edge of the image.",
"obj_cls": "bridge",
"obj_corner": [
0.77734375,
0.8359375,
0.8515625,
0.8359375,
0.8515625,
0.88671875,
0.77734375... | [
{
"ques_id": 0,
"question": "What is the main dark linear feature running through the image?",
"type": "object category",
"answer": "river"
},
{
"ques_id": 1,
"question": "What man-made structure crosses the river near the bottom-right corner?",
"type": "object category",
"answer... | 0000052.png |
This SAR image shows a highly textured scene with strong linear and block-like bright returns along the right side and upper-right area, contrasting with darker, more diffuse backscatter in the lower-left region. Near the vertical bright strip in the central area, there are two medium-sized ship targets aligned roughly along a vertical path, standing out as bright rectangular signatures against a darker background. One ship appears higher in the frame near the middle, while the other lies further down toward the bottom, both positioned slightly right of the image center. Surrounding clutter and speckle form a complex background with no other clearly isolated large objects besides these two ships. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized ship lies slightly right of center in the upper-middle region, appearing as a bright rectangular patch adjacent to the vertical bright structural strip.",
"obj_cls": "ship",
"obj_corner": [
0.54296875,
0.375,
0.59375,
0.375... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the main object category highlighted in this SAR image?",
"type": "object category",
"answer": "ships"
},
{
"ques_id"... | 0000056.jpg |
This SAR image shows a mostly dark area with scattered bright linear and point-like reflections, indicating man‑made structures within a larger open region. A medium-sized aircraft is visible on the right side of the image, appearing as a bright, compact shape contrasting with the darker surroundings. Additional faint bright spots and short linear features are dispersed around the scene, suggesting other smaller structures or infrastructure elements. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized aircraft is located on the right side of the image as a bright, compact shape standing out against the dark background.",
"obj_cls": "aircraft",
"obj_corner": [
0.705078125,
0.322265625,
0.84765625,
0.322265625,
0.847... | [
{
"ques_id": 0,
"question": "What is the category of the bright medium-sized object on the right side of the image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are visible in this image based on the provided objects?",
"type": "... | 0000057.jpg |
This SAR image shows a dark, speckled background with a single bright, elongated ship near the center. The ship appears as a narrow vertical strip of strong radar reflection, standing out clearly against the low-intensity surroundings. No other prominent structures or objects are visible around the vessel in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The image contains a single medium-sized ship located near the center, appearing as a bright, narrow vertical streak against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.55078125,
0.31640625,
0.59765625,
0.31640625,
0... | [
{
"ques_id": 0,
"question": "What is the main object visible near the center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_i... | 0000064.jpg |
This SAR image shows a mostly uniform textured background with two detected ship targets. Near the lower-right portion of the scene, a brighter, elongated medium-sized ship stands out clearly against the darker surroundings. Another medium-sized ship is indicated at the extreme top-left corner, but it is very close to the image edge and much less distinct. The overall scene is sparse, with the two ships separated widely across the otherwise homogeneous background. | [
{
"obj_id": 0,
"referring_sentence": "A bright, elongated medium-sized ship is located in the lower-right area of the image, standing out clearly against the darker background.",
"obj_cls": "ship",
"obj_corner": [
0.6328125,
0.50390625,
0.71875,
0.50390625,
0.71875,
... | [
{
"ques_id": 0,
"question": "How many ships are indicated in the image in total?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the general category of the bright elongated target in the lower-right area?",
"type": "object category",
"answer"... | 0000068.jpg |
This SAR image shows a large linear bridge structure occupying the entire right side of the scene. The bridge forms a bright, continuous vertical band contrasting with the darker textured background that fills the central and left areas. At the lower left corner, the background appears slightly brighter and more irregular, suggesting a change in surface or material. Overall, the image is dominated by the single prominent bridge feature along the right edge. | [
{
"obj_id": 0,
"referring_sentence": "The large bright bridge spans continuously along the entire right edge of the image from top to bottom.",
"obj_cls": "bridge",
"obj_corner": [
0.83984375,
0.00390625,
1,
0.00390625,
1,
1,
0.83984375,
1
],
"... | [
{
"ques_id": 0,
"question": "What is the large linear structure along the right edge of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "Where is the bridge located within the image?",
"type": "object position",
"answer": "right side"
}... | 0000071.jpg |
This SAR image shows a textured landscape filled with many small bright scatterers across most of the frame. Toward the bottom-right edge, a medium-sized bright bridge-like linear structure curves gently across a darker background, standing out from the more granular surroundings. The rest of the scene appears as a dense, relatively uniform pattern of return signals without other clearly defined large man-made structures. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright bridge structure lies in the bottom-right area of the image, forming a short curved segment that contrasts clearly against the darker background underneath it.",
"obj_cls": "bridge",
"obj_corner": [
0.78515625,
0.875,
0.83... | [
{
"ques_id": 0,
"question": "What man-made linear structure is visible near the bottom-right of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "Where is the bridge located within the image frame?",
"type": "object position",
"answer": "b... | 0000074.png |
This SAR image shows a mostly textured background with a single bright rectangular ship located toward the upper central area. The ship appears medium in size compared with the overall scene and stands out clearly against the darker speckled surroundings. No other distinct large man-made structures are visible around the vessel. | [
{
"obj_id": 0,
"referring_sentence": "A medium bright rectangular ship is located near the top center of the image, clearly standing out from the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.52734375,
0.0390625,
0.65625,
0.0390625,
0.65625,
0... | [
{
"ques_id": 0,
"question": "What is the category of the bright rectangular object near the top center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"... | 0000082.jpg |
This SAR image shows a winding linear feature crossing the scene diagonally, likely representing a road or narrow bridge corridor over a textured landscape. Near the center, a medium-sized rectangular dark structure is visible along this linear feature, contrasting strongly with the surrounding speckled background. Several small bright scatterers cluster to the left side of the image, while the rest of the area appears as rough, uneven terrain with varying backscatter levels. | [
{
"obj_id": 0,
"referring_sentence": "The bridge is the medium-sized, distinctly dark rectangular structure located near the center of the image, aligned with the curving linear feature that runs diagonally across the scene.",
"obj_cls": "bridge",
"obj_corner": [
0.375,
0.44921875,
... | [
{
"ques_id": 0,
"question": "What is the category of the medium-sized dark rectangular structure near the center of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in this SAR image?",
"type": "object quantity",
... | 0000084.png |
This SAR image shows an urban area with a straight medium-sized bridge running horizontally across the top-middle of the scene over a darker linear corridor. Around the bridge, the surroundings are filled with dense bright and dark speckled patterns that indicate clustered buildings and infrastructure. Below the bridge, a large textured region occupies much of the central area, with a few brighter rectangular structures scattered within it. Additional linear features and blocks of strong reflections appear toward the top and bottom edges, suggesting more roads and built-up structures around the main bridge corridor. | [
{
"obj_id": 0,
"referring_sentence": "The object is the medium-sized straight bridge positioned across the top-middle of the image, forming a bright horizontal strip over a darker linear corridor.",
"obj_cls": "bridge",
"obj_corner": [
0.4140625,
0.16015625,
0.47265625,
0.160... | [
{
"ques_id": 0,
"question": "What is the object forming a bright horizontal strip over the darker corridor in the top-middle of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in the image?",
"type": "object quan... | 0000087.png |
This SAR image shows a mostly uniform textured background with a single bright ship target on the right side. The ship appears as a compact, medium-sized, elongated bright cluster located in the lower-right portion of the scene, standing out clearly from the darker speckled surroundings. A faint horizontal linear feature runs across the upper central region of the image, contrasting with the isolated bright ship return below it. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship appears as a bright, elongated cluster located in the lower-right part of the image against the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.82421875,
0.53515625,
0.921875,
0.53515625,
0.9... | [
{
"ques_id": 0,
"question": "What is the bright elongated object in the lower-right part of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000096.jpg |
This SAR image shows a textured bright region at the top contrasting with a darker, more uniform region in the lower part of the scene. Within the darker area near the center, there is a single medium-sized bright ship-like target standing out against the surrounding low backscatter background. The strong contrast between the bright target and the dark water-like area makes the ship clearly distinguishable from its surroundings. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship is located slightly left of the image center within the dark lower region, appearing as a compact vertical bright patch that stands out against the surrounding darker background.",
"obj_cls": "ship",
"obj_corner": [
0.27734375,
... | [
{
"ques_id": 0,
"question": "What type of vessel-like object is visible in the darker lower region of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are present in this SAR image?",
"type": "object quantity",
"answer": "one... | 0000097.jpg |
This SAR image shows a textured landscape with a mix of bright and dark patches, indicating varied surface structures and reflectivity. In the top-right area, a medium-sized linear bridge spans across a darker region, contrasting with the surrounding brighter granular background. Several faint, radiating linear features extend from the lower part of the image, intersecting the rough surface pattern. The overall scene appears densely textured with no large open uniform areas aside from the darker patches near the upper edge. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright bridge is located in the top-right portion of the image, extending horizontally across a dark background area.",
"obj_cls": "bridge",
"obj_corner": [
0.82421875,
0.0078125,
0.9453125,
0.0078125,
0.9453125,
... | [
{
"ques_id": 0,
"question": "What is the main man-made structure visible in the top-right part of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are present in the image?",
"type": "object quantity",
"answer": "one"
}... | 0000103.png |
This SAR image shows a mostly uniform textured background with two bright ship targets in the lower-right region. One medium-sized ship appears higher in the frame near the center-right, while another slightly smaller medium-sized ship is located close to the bottom edge near the right corner. The ships stand out as distinct bright spots against the darker, grainy surroundings. | [
{
"obj_id": 0,
"referring_sentence": "The smaller bright ship is located near the bottom-right corner, close to the lower edge of the image.",
"obj_cls": "ship",
"obj_corner": [
0.8203125,
0.953125,
0.84765625,
0.953125,
0.84765625,
1,
0.8203125,
1
... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "Where are the ships primarily located within the image?",
"type": "object position",
"answer": "lower-right"
},
{
"ques_id": ... | 0000104.jpg |
This SAR image shows a single bright, medium-sized ship situated near the center of an otherwise dark background. The ship appears as an elongated, slightly angled bright strip with concentrated reflections along its length, standing out clearly from the surrounding low-intensity area. No other prominent objects or structures are visible around the vessel in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship near the center of the image appears as a bright, elongated strip angled diagonally against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.41015625,
0.40234375,
0.71484375,
0.40234375,
0.71484375,
... | [
{
"ques_id": 0,
"question": "What is the main object visible near the center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"que... | 0000109.jpg |
This SAR image shows a textured landscape with two bright linear bridges crossing a darker network of structures and terrain. One medium-sized bridge segment appears near the top-right portion of the image, while a slightly larger bridge segment lies further down along the right edge. The surrounding area contains mixed bright and dark patches forming irregular fields or surfaces, intersected by fine lines that resemble narrow paths or smaller linear features. | [] | [
{
"ques_id": 0,
"question": "How many bridge segments are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the main man-made linear structure type visible on the right side of the image?",
"type": "object category",
"answe... | 0000111.png |
This SAR image shows a mostly dark background with a single bright linear target near the lower central area. The bright object has an elongated shape consistent with a medium-sized ship located in the bottom-middle of the scene. Surrounding the ship, the rest of the image appears as low-intensity speckle with no other distinct large structures visible. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized, bright elongated ship is located in the bottom-middle of the image against a dark background.",
"obj_cls": "ship",
"obj_corner": [
0.50390625,
0.67578125,
0.609375,
0.67578125,
0.609375,
0.7734375,
0.5039... | [
{
"ques_id": 0,
"question": "What is the main object visible near the bottom-middle of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000112.jpg |
This SAR image shows a mostly dark, grainy sea surface with a single bright feature on the right side. The bright, elongated object on the right is a medium-sized ship standing out clearly from the surrounding textured water. No other distinct large objects are visible around the vessel in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized, bright ship appears near the right edge of the image, with an elongated shape extending slightly downward from a compact bright core.",
"obj_cls": "ship",
"obj_corner": [
0.85546875,
0.2265625,
0.98828125,
0.2265625,
... | [
{
"ques_id": 0,
"question": "What is the bright elongated object near the right edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
"qu... | 0000114.jpg |
This SAR image shows a dense urban area with bright linear features and several distinct car-sized objects scattered near the top and center of the scene. At least six cars are visible, with one large bright car-like target near the center-bottom area and several medium to large ones aligned near the upper part of the image from left to right. The surrounding environment contains bright rectangular patches and streaks suggestive of buildings and narrow roads running through the area. Overall, the scene depicts a cluttered built-up region with multiple vehicles positioned along bright structural features. | [
{
"obj_id": 0,
"referring_sentence": "A large bright car-shaped object is located near the center-bottom of the image, standing alone on a relatively wide bright strip.",
"obj_cls": "car",
"obj_corner": [
0.4375,
0.455078125,
0.564453125,
0.455078125,
0.564453125,
... | [
{
"ques_id": 0,
"question": "What is the main scene type shown in this SAR image?",
"type": "scene type",
"answer": "urban area"
},
{
"ques_id": 1,
"question": "How many car-shaped objects are visible in the image?",
"type": "object quantity",
"answer": "six"
},
{
"ques_i... | 0000115.jpg |
This SAR image shows a mostly dark water area with a single bright medium-sized ship located toward the right side of the scene. The ship appears as a compact cluster of strong reflections with a short bright streak extending horizontally over the dark background. No other distinct objects are visible around the vessel, emphasizing its isolation on the open water. | [
{
"obj_id": 0,
"referring_sentence": "The only visible ship is a medium-sized bright vessel positioned near the right side of the image against the otherwise dark background.",
"obj_cls": "ship",
"obj_corner": [
0.6328125,
0.5390625,
0.91796875,
0.5390625,
0.91796875,
... | [
{
"ques_id": 0,
"question": "What is the main object visible in the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"question"... | 0000116.jpg |
This SAR image shows a dark background with scattered bright reflections indicating man‑made structures and linear features. Numerous small bright points and short streaks are distributed across the scene, with a concentration of intense reflections in the lower-right area. A single medium-sized bright rectangular ship is located near the bottom-right edge of the image, standing out from the surrounding smaller reflections. Additional linear bright traces suggest possible built infrastructure or edges around the central and upper parts of the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright rectangular ship is located near the bottom-right edge of the image, slightly above and left of the extreme corner.",
"obj_cls": "ship",
"obj_corner": [
0.8828125,
0.8515625,
0.9375,
0.8515625,
0.9375,
0.... | [
{
"ques_id": 0,
"question": "What is the category of the medium-sized bright rectangular object near the bottom-right edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",... | 0000118.jpg |
This SAR image shows a mostly uniform textured background with strong speckle noise, within which a single bright object appears near the bottom-middle area. The bright object has an elongated shape and stands out clearly from the darker surroundings, indicating one medium-sized ship against the noisy background. No other distinct large structures such as buildings, roads, or additional vessels are clearly visible in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized, bright elongated ship is located near the bottom-middle of the image, clearly standing out from the surrounding speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.34765625,
0.78515625,
0.5703125,
0.78515625... | [
{
"ques_id": 0,
"question": "What is the category of the bright elongated object near the bottom-middle of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one... | 0000125.jpg |
This SAR image shows a mostly dark background with a single medium-sized aircraft visible near the top-right area. The aircraft appears as a bright rectangular cluster of radar reflections standing out clearly from the sparse surrounding speckle. No other distinct large structures such as roads or buildings are clearly visible, emphasizing the isolation of this lone aircraft target in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized aircraft appears near the top-right of the image as a bright rectangular patch contrasting strongly with the dark background.",
"obj_cls": "aircraft",
"obj_corner": [
0.763671875,
0.11328125,
0.912109375,
0.11328125,
... | [
{
"ques_id": 0,
"question": "What is the main object visible near the top-right of the image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are clearly visible in this image?",
"type": "object quantity",
"answer": "one"
},
... | 0000128.jpg |
This SAR image shows a textured area with bright scatterers across the center and upper region, likely representing a dense man‑made zone. In the bottom-right part of the scene, a medium-sized linear structure extends nearly vertically, contrasting with the surrounding speckled background. Several rectangular bright patches appear above the central area, while the lower edge contains a darker elongated band crossing the width of the image. Overall, the scene is dominated by strong backscatter in the middle and more uniform tones toward the edges, with one clear bridge-like structure near the bottom-right corner. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bridge structure is located near the bottom-right edge of the image, appearing as a short, nearly vertical bright strip standing out from the darker band below it.",
"obj_cls": "bridge",
"obj_corner": [
0.7734375,
0.8515625,
0.... | [
{
"ques_id": 0,
"question": "What is the object positioned near the bottom-right edge of the image that appears as a short, bright linear feature?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are present in this SAR image?",
"type":... | 0000130.png |
This SAR image shows a mostly dark background with a single medium-sized bright ship located near the center of the scene. The ship appears as a narrow, elongated vertical cluster of strong radar reflections standing out clearly against the low-return surrounding area. No other prominent man-made structures or large objects are visible around the ship, emphasizing its isolation within the open background. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized, vertically elongated bright ship positioned near the center of the image is the only clearly visible object.",
"obj_cls": "ship",
"obj_corner": [
0.4140625,
0.5,
0.44921875,
0.5,
0.44921875,
0.609375,
0... | [
{
"ques_id": 0,
"question": "What is the main object visible near the center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"que... | 0000131.jpg |
This SAR image shows a textured background with a single bright medium-sized ship target near the lower-right central area. The ship appears as a compact, high-intensity cluster of pixels against a relatively uniform speckled sea background, and no other distinct objects are visible around it. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship is the bright, concentrated white spot located slightly below and to the right of the image center against the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.6328125,
0.62890625,
0.72265625,
0.628... | [
{
"ques_id": 0,
"question": "What is the main identifiable object in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
... | 0000133.jpg |
This SAR image shows a bright linear area of infrastructure along the right side, bordered by darker regions that appear as open spaces or water. Near the lower part of the scene, a cluster of bright rectangular aircraft-like objects is arranged close together, with three medium-sized aircraft aligned diagonally from the bottom-left toward the center-right. The surroundings include additional bright point targets and short linear features that resemble roads or hardstand areas around the aircraft. The contrast between the bright reflective structures and the dark background emphasizes the layout of this compact airfield or apron area within a larger transport or industrial zone. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized aircraft is located in the bottom-left portion of the image, appearing as a bright rectangular shape slightly separated from the denser cluster of aircraft above it.",
"obj_cls": "aircraft",
"obj_corner": [
0.033203125,
0.734375,
... | [
{
"ques_id": 0,
"question": "How many aircraft are visible in the image?",
"type": "object quantity",
"answer": "3"
},
{
"ques_id": 1,
"question": "What is the general shape of the aircraft in this image?",
"type": "object shape",
"answer": "rectangular"
},
{
"ques_id": 2... | 0000135.jpg |
This SAR image shows a mostly dark background with a single bright linear ship near the bottom-left corner. The ship appears as a medium-sized, elongated white strip diagonally emerging from the lower-left edge of the image, contrasting sharply with the surrounding dark sea-like area. No other distinct objects or structures are visible around it. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship lies diagonally along the lower-left edge against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0,
0.8125,
0.1875,
0.8125,
0.1875,
0.99609375,
0,
0.99609375
],
"obj_co... | [
{
"ques_id": 0,
"question": "What is the bright elongated object near the bottom-left edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000138.jpg |
This SAR image shows a noisy textured background with one clear linear bright target near the middle-left region. The target appears as a narrow, vertically oriented medium-sized ship standing out sharply from the surrounding speckled background. No other distinct large objects are visible apart from the bright ship against the uniform clutter-like surroundings. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship is the bright, narrow vertical feature located in the middle-left area of the image, distinctly standing out from the speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.2734375,
0.4296875,
0.31640625,
0.4296... | [
{
"ques_id": 0,
"question": "What is the prominent bright object located in the middle-left area of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
... | 0000139.jpg |
This SAR image shows a mostly dark scene with a single bright medium-sized ship located at the top-right edge of the frame. The ship forms a narrow, elongated bright cluster contrasting sharply with the surrounding dark background, indicating open water or an empty area around it. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship appears as a bright, elongated cluster positioned along the top-right edge of the image against a dark background.",
"obj_cls": "ship",
"obj_corner": [
0.8359375,
0.1171875,
0.99609375,
0.1171875,
0.99609375,
... | [
{
"ques_id": 0,
"question": "What is the bright elongated object located at the top-right edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
... | 0000140.jpg |
This SAR image shows a dense built-up area bordering a darker linear water body or channel toward the right side. Numerous bright, compact scatterers fill the left and central portions, indicating many small urban structures separated by narrow linear features resembling streets. Along the middle-right side, a medium-sized bright bridge spans the darker channel, clearly linking the brighter urban area on the left with the terrain on the far right. A thin, slightly curved dashed line runs diagonally across the scene, crossing both the urban area and the channel. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bright bridge in the middle-right of the image crosses the dark channel between the dense cluster of bright buildings on the left and the narrower bright area on the far right.",
"obj_cls": "bridge",
"obj_corner": [
0.69921875,
0.449... | [
{
"ques_id": 0,
"question": "What is the main man-made structure that crosses the dark channel in the middle-right of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible spanning the dark channel in this image?",
"ty... | 0000142.png |
This SAR image shows a mostly dark background with a single bright medium-sized ship located along the left side of the frame. The ship appears as an elongated reflective shape standing out clearly against the surrounding dark water-like area. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized bright ship lies along the left edge of the image, forming an elongated reflective strip against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0,
0.3203125,
0.12109375,
0.3203125,
0.12109375,
... | [
{
"ques_id": 0,
"question": "What is the main object visible near the left edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id"... | 0000146.jpg |
This SAR image shows a mostly dark background with a single bright medium-sized ship located near the center of the scene. The ship appears as a compact vertical cluster of strong radar reflections standing out sharply from the sparse speckle noise scattered across the image. No other large structures, coastline, or additional vessels are visible around it, leaving the ship as the only prominent object in the frame. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized ship formed by a bright, vertically elongated cluster of radar returns is located near the center of the image.",
"obj_cls": "ship",
"obj_corner": [
0.53125,
0.3359375,
0.58984375,
0.3359375,
0.58984375,
0.49609... | [
{
"ques_id": 0,
"question": "What is the type of the bright medium-sized object near the center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
... | 0000147.jpg |
This SAR image shows a mostly dark scene with a single bright ship located in the bottom-left area. The ship appears as an elongated, medium-sized bright streak with strong radar reflections, standing out clearly against the surrounding dark background. No other distinct objects or structures are visible around it. | [
{
"obj_id": 0,
"referring_sentence": "The image contains a single medium-sized ship near the bottom-left, visible as an elongated bright streak against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.1953125,
0.67578125,
0.32421875,
0.67578125,
0.32421875,
... | [
{
"ques_id": 0,
"question": "What is the main object visible near the bottom-left of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_i... | 0000149.jpg |
This SAR image shows a large bright bridge-like structure occupying the lower-right portion of the scene, standing out against a darker, more uniform background. The bridge extends diagonally across the corner area and appears wider than any other linear feature in the image. Above the bridge, the scene contains a dense, speckled texture with scattered bright points and streaks that may correspond to smaller man-made features or rough terrain. The contrast between the prominent bridge structure and the surrounding textured background clearly emphasizes the bridge as the main object in the image. | [
{
"obj_id": 0,
"referring_sentence": "The image contains a single large, bright bridge structure spanning diagonally across the lower-right corner, covering much of the bottom and right edges of the scene.",
"obj_cls": "bridge",
"obj_corner": [
0.375,
0.6484375,
1,
0.6484375,... | [
{
"ques_id": 0,
"question": "What is the main man-made structure visible in the lower-right part of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges can be clearly identified in this SAR image?",
"type": "object quantity",
... | 0000152.jpg |
The SAR image shows a textured water surface with two bright, elongated ship targets standing out against the darker granular background. One medium-sized ship is located near the upper-right edge of the image, and another medium-sized ship appears near the lower-left edge. The ships are separated by a large expanse of speckled water, with no other prominent objects visible. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship lies near the upper-right edge of the image, slightly above the center and close to the right border.",
"obj_cls": "ship",
"obj_corner": [
0.83984375,
0.60546875,
0.99609375,
0.60546875,
0.99609375,
... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the main object category present in this SAR image?",
"type": "object category",
"answer": "ships"
},
{
"ques_id": 2,... | 0000155.jpg |
This SAR image shows a dark, speckled background with a single bright, elongated ship feature along the left side of the frame. The large ship appears as a strong reflective shape stretching vertically near the left edge, contrasting sharply against the noisy surrounding sea surface. No other distinct man-made objects are visible in the image beyond this prominent ship. | [
{
"obj_id": 0,
"referring_sentence": "The large, bright, elongated ship is located along the left edge of the image, standing out clearly against the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.00390625,
0.00390625,
0.20703125,
0.00390625,
0.20703... | [
{
"ques_id": 0,
"question": "What is the main man-made object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
... | 0000157.jpg |
This SAR image shows a single medium-sized ship located toward the middle-left of an otherwise dark and empty sea background. The ship forms a bright, elongated shape against the uniform dark surroundings, with no other vessels or coastal structures visible nearby. | [
{
"obj_id": 0,
"referring_sentence": "The only visible ship is a medium-sized bright vessel positioned near the middle-left side of the dark sea background.",
"obj_cls": "ship",
"obj_corner": [
0.00390625,
0.57421875,
0.13671875,
0.57421875,
0.13671875,
0.61328125... | [
{
"ques_id": 0,
"question": "What is the main object visible in the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"question"... | 0000159.jpg |
This SAR image shows a bright linear bridge structure crossing a darker area, likely spanning over a contrasting background. The medium-sized bridge extends diagonally across the right-central part of the scene, with strong reflective returns along its length. Surrounding the bridge are textured regions with mixed bright and dark speckle patterns, indicating varied surfaces around the crossing area. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bridge is the bright linear structure crossing diagonally through the right-central portion of the image.",
"obj_cls": "bridge",
"obj_corner": [
0.4921875,
0.51953125,
0.76953125,
0.51953125,
0.76953125,
0.769... | [
{
"ques_id": 0,
"question": "What is the category of the bright linear structure crossing diagonally through the right-central part of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in the image?",
"type": "obje... | 0000162.jpg |
This SAR image shows a bright, structured urban area with dense clusters of strong reflections connected by a grid of straight, linear features that resemble major roads. Numerous small, bright points form blocks of buildings concentrated toward the left and upper parts of the scene, while the central and lower-right areas appear darker and more open. In the lower-left portion, a medium-sized aircraft with a compact, bright signature stands out among the nearby bright urban scatterers. The overall scene combines concentrated urban development with surrounding darker regions that have fewer strong reflectors. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized aircraft is located in the bottom-left part of the image, appearing as a bright, compact shape separated from but adjacent to dense clusters of urban reflections.",
"obj_cls": "aircraft",
"obj_corner": [
0.119140625,
0.80078125,
... | [
{
"ques_id": 0,
"question": "What is the main type of large man-made object located in the bottom-left part of the image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are annotated in this SAR image?",
"type": "object quantity",
... | 0000163.jpg |
This SAR image shows a speckled background with three bright, elongated ship targets standing out clearly against the darker clutter. One medium-sized ship is located near the top-left portion of the scene, another medium-sized ship appears near the top edge on the right side, and a third medium-sized ship is positioned in the lower central area. All three ships have similar narrow, vertical shapes and are distinctly brighter than the surrounding background. | [
{
"obj_id": 0,
"referring_sentence": "A bright, medium-sized ship stands near the top edge of the image on the right side, appearing as a narrow vertical streak against the darker background.",
"obj_cls": "ship",
"obj_corner": [
0.64453125,
0.00390625,
0.7265625,
0.00390625,
... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "three"
},
{
"ques_id": 1,
"question": "What is the general shape of the ships in this SAR image?",
"type": "object shape",
"answer": "elongated"
},
{
"ques_id": 2... | 0000164.jpg |
This SAR image shows a dark background with a single medium-sized bright ship located on the left side of the scene. The ship appears as a compact cluster of strong reflections with a short, faint linear wake extending vertically, contrasting sharply with the surrounding low-intensity speckled sea surface. No other distinct large objects are visible in the image, emphasizing the isolation of this lone vessel within the dark water area. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized ship is the bright, compact vessel located on the left side of the image, accompanied by a faint vertical streak extending from it.",
"obj_cls": "ship",
"obj_corner": [
0.1640625,
0.29296875,
0.2421875,
0.29296875,
... | [
{
"ques_id": 0,
"question": "What is the main object visible on the left side of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
"q... | 0000168.jpg |
This SAR image shows a largely speckled background with a single bright medium-sized ship located near the top edge of the frame. The ship appears as a strong reflective rectangular patch contrasting sharply against the otherwise uniform textured sea surface. No other distinct objects are visible around the vessel in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized bright ship is located near the top central area of the image, standing out clearly against the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.52734375,
0.00390625,
0.76171875,
0.00390625,
0... | [
{
"ques_id": 0,
"question": "What is the main object visible near the top of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
... | 0000169.jpg |
This SAR image shows a dark water background with two medium-sized ships appearing as bright, compact targets in the right half of the scene. One ship is located in the middle-right area and slightly higher in the frame, while the other ship is positioned further down toward the lower-right region. Faint linear bright returns, likely from larger structures or boundaries, run diagonally across the image, contrasting with the otherwise uniform dark surroundings. | [
{
"obj_id": 0,
"referring_sentence": "The ship located in the middle-right area of the image, appearing as a bright medium-sized target slightly above the center, is the higher of the two vessels.",
"obj_cls": "ship",
"obj_corner": [
0.8203125,
0.37890625,
0.8984375,
0.378906... | [
{
"ques_id": 0,
"question": "What is the main type of object visible in this SAR image?",
"type": "object category",
"answer": "ships"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 2,
... | 0000170.jpg |
This SAR image shows a mostly dark background with two bright, elongated ships standing out clearly. One medium-sized ship is located near the top-right area of the image, while another medium-sized ship is positioned closer to the center but slightly lower. The ships appear as concentrated bright streaks against the otherwise uniform dark surroundings, with no other prominent structures or features visible. Overall, the scene is very sparse, containing only these two detectable ships on a dark surface. | [
{
"obj_id": 0,
"referring_sentence": "A bright medium-sized ship is located near the top-right area of the image, appearing as a short diagonal streak against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.71875,
0.0475,
0.75875,
0.0475,
0.75875,
0.08... | [
{
"ques_id": 0,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the category of the bright elongated objects detected in the dark background?",
"type": "object category",
"answer": "ships"
... | 0000175.jpg |
This SAR image shows a dark textured water surface with three bright, elongated ship targets scattered across the scene. One medium-sized ship appears near the left side in the lower half of the image, another medium-sized ship lies in the upper-right portion, and a third medium-sized ship is located at the extreme bottom-right corner. The ships are clearly separated from one another, forming a loose diagonal distribution from the left-lower area toward the bottom-right edge. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship near the left side of the image in the lower half appears as a compact bright spot standing out against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.10546875,
0.63671875,
0.17578125,
0.63671875,
... | [
{
"ques_id": 0,
"question": "What is the main type of object visible in this SAR image?",
"type": "object category",
"answer": "ships"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "three"
},
{
"ques_id": 2... | 0000176.jpg |
This SAR image shows a mostly dark background area with a brighter textured region along the right side. Within the brighter right side near the top, there is a single medium-sized ship-shaped target standing out from the surrounding speckle. The ship appears as a compact bright rectangle separated from the darker region to its left. No other clearly defined large man-made objects are visible in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship is located near the upper-right part of the image within the lighter textured region.",
"obj_cls": "ship",
"obj_corner": [
0.73828125,
0.09765625,
0.76953125,
0.09765625,
0.76953125,
0.14453125,
... | [
{
"ques_id": 0,
"question": "What is the category of the bright object located near the upper-right area of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer"... | 0000179.jpg |
This SAR image shows a mostly dark background with a single bright cluster near the bottom-right area. The bright cluster represents one medium-sized ship, appearing as an intense, compact reflection against the otherwise uniform dark surroundings. No other distinct objects or structures are visible in the scene, emphasizing the isolation of the ship within the open area. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized ship is located close to the bottom-right edge of the image as a compact, bright cluster standing out against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.79296875,
0.7421875,
0.9375,
0.7421875,
... | [
{
"ques_id": 0,
"question": "What is the main object visible in this SAR image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"ques... | 0000180.jpg |
This SAR image shows a mostly dark water surface with a single large, bright ship pattern located toward the right-central area. The ship appears elongated and angled, with its reflective structure standing out clearly against the dark background, while the surrounding region contains no other prominent ships or man-made structures. | [
{
"obj_id": 0,
"referring_sentence": "A single large, bright ship with an elongated shape is located in the right-central area of the image, clearly standing out against the dark water background.",
"obj_cls": "ship",
"obj_corner": [
0.525390625,
0.458984375,
0.744140625,
0.4... | [
{
"ques_id": 0,
"question": "What is the main object visible in the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many large ships are clearly visible in this image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,... | 0000184.jpg |
This SAR image shows a dark water body occupying the central area, crossed by a single large bright bridge structure that runs roughly from the upper left toward the lower right. The bridge spans the width of the water body and has several bright linear segments and joints, indicating multiple connected sections. Above the water body, a more textured bright region suggests dense man‑made structures and linear features connecting to the bridge. Below the bridge, the scene is mostly dark with only faint scattered returns, emphasizing the prominence of the bridge and adjacent linear elements. | [
{
"obj_id": 0,
"referring_sentence": "A single large bright bridge crosses the dark water body diagonally from the upper left side of the image toward the lower right side.",
"obj_cls": "bridge",
"obj_corner": [
0.13671875,
0.4453125,
0.38671875,
0.4453125,
0.38671875,
... | [
{
"ques_id": 0,
"question": "What is the large bright linear structure crossing the dark water body diagonally?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible crossing the dark central water body?",
"type": "object quantit... | 0000187.jpg |
This SAR image shows a vertically oriented bright band running from the top to the bottom against a darker, speckled background. A single medium-sized ship is located along the brighter area in the lower-left half of the image, standing out as a more defined bright shape near the bottom edge. The surrounding region appears as a uniform textured pattern without other distinct large objects. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized ship appears as a bright rectangular shape positioned near the bottom edge of the image along the left side of the vertical bright band.",
"obj_cls": "ship",
"obj_corner": [
0.2734375,
0.515625,
0.38671875,
0.515625,
... | [
{
"ques_id": 0,
"question": "What is the main identifiable object located near the bottom edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
... | 0000189.jpg |
This SAR image shows a dark background with four bright aircraft targets aligned roughly along the vertical center of the scene. One small aircraft lies near the very top-middle of the image, while another small aircraft is slightly lower in the upper-middle area. Below them, two medium-sized aircraft appear stacked toward the central part of the image, with the lowest one located near the middle of the frame. The aircraft differ slightly in size and vertical placement but share a similar compact, bright appearance against the darker surroundings. | [
{
"obj_id": 1,
"referring_sentence": "The small aircraft located near the very top-middle of the image, appearing as the uppermost bright compact target, is the referenced object.",
"obj_cls": "aircraft",
"obj_corner": [
0.408203125,
0.025390625,
0.51953125,
0.025390625,
... | [
{
"ques_id": 0,
"question": "What is the object type of the bright targets aligned near the vertical center of the image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are visible in the image?",
"type": "object quantity",
"an... | 0000193.jpg |
This SAR image shows a mostly dark background with a single bright linear object near the middle-left area. The bright object is a medium-sized ship, appearing as a compact, elongated cluster of strong radar reflections against the otherwise low-return surroundings. No other distinct man-made structures or vehicles are visible in the scene, emphasizing the isolation of this lone ship. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized, bright elongated ship is located in the middle-left part of the image, standing out clearly against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.0234375,
0.40234375,
0.18359375,
0.40234375,
0.18359375,... | [
{
"ques_id": 0,
"question": "What is the main object visible near the middle-left of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_i... | 0000198.jpg |
The SAR image shows a mostly uniform textured background with a single bright object on the right side. This bright object is a medium-sized ship, appearing as a strong linear scatterer with a short extension of speckled returns trailing below it. No other distinct man-made structures or vehicles are visible in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship is located on the right side of the image, standing out clearly against the darker, uniform background.",
"obj_cls": "ship",
"obj_corner": [
0.7578125,
0.6328125,
0.921875,
0.6328125,
0.921875,
0.703... | [
{
"ques_id": 0,
"question": "What is the bright linear object on the right side of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id"... | 0000200.jpg |
This SAR image shows a mostly dark water or open area crossed by a single bright, medium-sized ship near the upper central region. The ship appears as an elongated bright rectangle running diagonally across the darker background. Around the scene, several bright, scattered patches suggest surrounding textured surfaces or structures, but no other distinct ships are visible. Overall, the image highlights one clearly defined vessel set against a predominantly dark backdrop with speckled bright areas. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized ship lies near the top center of the image, appearing as a bright, elongated rectangular shape set diagonally across the darker background.",
"obj_cls": "ship",
"obj_corner": [
0.60546875,
0.16015625,
0.71875,
0.1601... | [
{
"ques_id": 0,
"question": "What is the main object visible near the top center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000203.jpg |
This SAR image shows a mostly dark background with a single bright medium-sized ship located near the bottom-middle of the scene. The ship appears as an elongated bright cluster, clearly separated from the surrounding dark water with no other prominent objects nearby. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bright ship positioned near the bottom-middle of the image is the only clearly visible object against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.4765625,
0.7890625,
0.63671875,
0.7890625,
0.63671875... | [
{
"ques_id": 0,
"question": "What is the main object visible near the bottom-middle of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000206.jpg |
This SAR image shows a dense urban-style grid pattern with bright scatterers forming blocks separated by darker linear gaps. Three medium-sized bridges span a darker horizontal corridor that runs across the central region of the image, connecting bright textured areas on both sides. The bridges are located toward the middle-left, central, and middle-right portions of the scene, evenly spaced along the dark corridor. Numerous small bright reflections fill the surrounding blocks, indicating a tightly packed built-up area around the bridges. | [
{
"obj_id": 0,
"referring_sentence": "The bridge located in the middle-left part of the image crosses the dark horizontal corridor near the center and is the left-most of the three bridges.",
"obj_cls": "bridge",
"obj_corner": [
0.01171875,
0.47265625,
0.0390625,
0.47265625,
... | [
{
"ques_id": 0,
"question": "What is the main linear feature that the three bridges cross in the central part of the image?",
"type": "object category",
"answer": "dark corridor"
},
{
"ques_id": 1,
"question": "How many bridges span the dark horizontal corridor in this image?",
"type... | 0000212.png |
This SAR image shows a mostly dark background with a single bright medium-sized ship near the center-left area. The ship appears as an elongated, high-intensity rectangular shape standing out clearly against the sparse surrounding returns, with no other distinct objects visible nearby. | [
{
"obj_id": 0,
"referring_sentence": "The image contains one medium-sized, brightly reflecting ship located slightly left of the center, appearing as an isolated elongated shape against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.21875,
0.375,
0.44921875,
0.37... | [
{
"ques_id": 0,
"question": "What is the bright elongated object slightly left of the image center?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000213.jpg |
This SAR image shows a mostly dark water surface with two bright, medium-sized ships separated widely across the scene. One larger cluster of bright returns appears toward the upper right area, while a smaller bright cluster is located near the lower left edge. The ships stand out sharply against the dark background, indicating strong radar reflections from their structures. The wide spacing of the two vessels emphasizes the emptiness of the surrounding water area. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized ship with the largest bright radar cluster is located in the upper right part of the image, slightly away from the right edge.",
"obj_cls": "ship",
"obj_corner": [
0.7578125,
0.2421875,
0.88671875,
0.2421875,
0.886718... | [
{
"ques_id": 0,
"question": "What type of object do the two bright clusters on the water represent?",
"type": "object category",
"answer": "ships"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "two"
},
{
"q... | 0000214.jpg |
This SAR image shows a dark background with several bright aircraft targets scattered across the scene. Four aircraft of medium to large size are visible, with one near the top-right area, another near the middle-left edge, another near the bottom-right corner, and one larger aircraft positioned toward the right-central region. The aircraft appear as compact, bright shapes contrasting sharply with the surrounding darker area, indicating man‑made structures within an otherwise sparse environment. Bright linear and clustered reflections run along the right side and across the central band of the image, suggesting additional structures aligned near the aircraft. | [
{
"obj_id": 1,
"referring_sentence": "The medium-sized aircraft located at the bottom-right corner of the image appears as a bright compact target near the lower and right edges.",
"obj_cls": "aircraft",
"obj_corner": [
0.6953125,
0.80859375,
0.90234375,
0.80859375,
0.9... | [
{
"ques_id": 0,
"question": "What is the main object category visible in this SAR image?",
"type": "object category",
"answer": "aircraft"
},
{
"ques_id": 1,
"question": "How many aircraft are visible in the image?",
"type": "object quantity",
"answer": "four"
},
{
"ques_... | 0000220.jpg |
This SAR image shows a bright linear waterway or channel running roughly from the top edge toward the bottom center, surrounded by textured terrain on both sides. Two distinct bridges cross this bright linear feature: one located near the top-middle area and another situated in the middle-right portion of the scene, with the lower bridge appearing slightly larger. The surrounding regions exhibit mixed dark and mid-tone patches, indicating varied surface structures flanking the channel and bridges. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bridge near the top-middle of the image spans the bright vertical channel where the channel is relatively narrow.",
"obj_cls": "bridge",
"obj_corner": [
0.46875,
0.30078125,
0.515625,
0.30078125,
0.515625,
0.3... | [
{
"ques_id": 0,
"question": "How many bridges cross the bright linear channel in the image?",
"type": "object quantity",
"answer": "two"
},
{
"ques_id": 1,
"question": "What is the main type of linear feature that the bridges are crossing?",
"type": "object category",
"answer": "... | 0000222.png |
This SAR image shows a river or water channel running roughly vertically through the scene, with bright structural features crossing and lining the banks. A medium-sized bridge spans the water near the upper part of the image, forming a straight, bright bar connecting the darker areas on both sides. Below the bridge, additional bright linear and clustered reflections appear along the waterway, indicating multiple man‑made structures concentrated near the lower central region. | [
{
"obj_id": 0,
"referring_sentence": "The medium-sized bright bridge near the upper center of the image stretches horizontally across the darker river, connecting the left and right banks in a straight line.",
"obj_cls": "bridge",
"obj_corner": [
0.376953125,
0.13671875,
0.73242187... | [
{
"ques_id": 0,
"question": "What type of structure crosses the water near the upper part of the image?",
"type": "object category",
"answer": "bridge"
},
{
"ques_id": 1,
"question": "How many bridges are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{... | 0000225.jpg |
This SAR image shows a mostly dark background with a single bright medium-sized ship near the center, slightly above the middle. The ship appears as an elongated, angled cluster of strong radar returns, standing out clearly from the surrounding empty area. No other significant objects or structures are visible around the ship in the scene. | [
{
"obj_id": 0,
"referring_sentence": "The image contains one medium-sized bright ship located near the center, slightly above the middle of the frame, appearing as an angled elongated cluster of radar reflections against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.46484375,
... | [
{
"ques_id": 0,
"question": "What is the main object visible in the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques_id": 2,
"question"... | 0000228.jpg |
This SAR image shows a textured terrain crossed by a winding river running from the lower-left toward the center. Two distinct linear structures span the river, appearing as bridges. One bridge is located near the bottom of the image where the river curves sharply, while another shorter bridge lies in the middle-left area over a straighter section of the river. The surrounding area appears mostly uniform, with scattered bright points indicating small man-made features or rougher surface patches. | [
{
"obj_id": 0,
"referring_sentence": "The larger bridge is positioned near the bottom of the image, crossing the sharply curving section of the river.",
"obj_cls": "bridge",
"obj_corner": [
0.32421875,
0.71875,
0.3515625,
0.71875,
0.3515625,
0.75,
0.32421875... | [
{
"ques_id": 0,
"question": "What natural feature winds through the scene from the lower-left toward the center?",
"type": "object category",
"answer": "river"
},
{
"ques_id": 1,
"question": "How many bridges are visible crossing the river?",
"type": "object quantity",
"answer": ... | 0000230.png |
This SAR image shows a mostly dark central region with several bright clusters of echoes concentrated toward the bottom and lower-left edges, indicating a developed area with multiple reflective structures. Three small bright aircraft targets are visible: one near the bottom center, one near the middle-right portion of the image, and one close to the left edge. The aircraft appear as compact, highly reflective spots surrounded by weaker clutter, contrasting with the more extended bright patterns of the built-up areas. The lower part of the scene contains the densest concentration of bright scatterers, while the upper part of the image remains comparatively sparse. | [
{
"obj_id": 0,
"referring_sentence": "The small aircraft located near the bottom edge slightly to the right of center appears as a compact bright spot separated from the denser bright cluster further below.",
"obj_cls": "aircraft",
"obj_corner": [
0.6328125,
0.916015625,
0.72070312... | [
{
"ques_id": 0,
"question": "How many aircraft are present in the image?",
"type": "object quantity",
"answer": "three"
},
{
"ques_id": 1,
"question": "Where is the smallest aircraft located in the image?",
"type": "object position",
"answer": "bottom center-right"
},
{
"... | 0000233.jpg |
This SAR image shows a textured background with a single bright medium-sized ship located in the middle-right area of the scene. The ship appears as an elongated, high-intensity shape that stands out clearly against the darker, grainy surroundings. No other distinct large objects or structures are visible around it. | [
{
"obj_id": 0,
"referring_sentence": "The object is a bright medium-sized ship positioned in the middle-right part of the image, forming an elongated white shape against the darker speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.6875,
0.515625,
0.85546875,
0.51562... | [
{
"ques_id": 0,
"question": "What is the category of the bright elongated object in the middle-right of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this image?",
"type": "object quantity",
"answer": "one"
... | 0000240.jpg |
This SAR image shows a mostly dark background with a single bright medium-sized ship located near the top-right area. The ship appears as an elongated reflective shape standing out clearly against the otherwise featureless surroundings. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship is located near the top-right edge of the image against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.796875,
0.21875,
0.94140625,
0.21875,
0.94140625,
0.31640625,
0.796875,
... | [
{
"ques_id": 0,
"question": "What type of main object is visible near the top-right of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques... | 0000245.jpg |
This SAR image shows a mostly dark scene with a single bright ship near the bottom-center of the frame. The medium-sized ship forms an elongated, angled cluster of strong radar reflections, standing out clearly against the otherwise empty background. Faint linear echoes extend vertically and horizontally from the ship, creating a cross-like pattern of weaker returns around it. | [
{
"obj_id": 0,
"referring_sentence": "The only medium-sized ship appears as a bright, elongated cluster of reflections near the bottom-center of the image.",
"obj_cls": "ship",
"obj_corner": [
0.40625,
0.7578125,
0.51953125,
0.7578125,
0.51953125,
0.9375,
0.... | [
{
"ques_id": 0,
"question": "What is the main object visible near the bottom-center of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"ques... | 0000250.jpg |
This SAR image shows a mostly dark background with a single bright medium-sized ship near the bottom portion of the scene. The ship appears as a compact, elongated cluster of strong radar reflections standing out clearly against the low-return surroundings. No other distinct large objects are visible around the ship in the image. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized ship is located near the bottom of the image, appearing as a bright elongated patch against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.19140625,
0.7109375,
0.36328125,
0.7109375,
0.36328125,
... | [
{
"ques_id": 0,
"question": "What is the category of the bright object near the bottom of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
},
{
... | 0000251.jpg |
This SAR image shows a mostly dark, speckled background with a single bright linear feature near the bottom portion of the scene. The bright return forms an isolated medium-sized ship-like target standing out clearly against the surrounding low-intensity clutter. No other large structures or distinct objects are visible around this solitary bright ship target. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized bright ship is located near the bottom part of the image, slightly to the right of center, forming a narrow elongated shape that contrasts sharply with the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.5703125,
0.75,
... | [
{
"ques_id": 0,
"question": "What is the main type of object visible near the bottom of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in the image?",
"type": "object quantity",
"answer": "one"
},
{
"que... | 0000252.jpg |
This SAR image shows a mostly dark background with a few bright reflective structures scattered across the scene. Near the top-middle area, a medium-sized bright ship-shaped target appears as a compact, elongated cluster of strong returns. Additional bright scatterers are visible toward the lower and right edges, suggesting other man‑made structures or vessels, but they are less centrally located and not as clearly defined as the main ship target. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship-shaped target is located near the top-middle of the image, standing out as a compact, elongated cluster of strong reflections against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.52734375,
0.2265625,
0.... | [
{
"ques_id": 0,
"question": "What is the object located near the top-middle of the image with a compact, elongated bright shape?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are clearly identified in this image?",
"type": "object quanti... | 0000253.jpg |
This SAR image shows a textured terrain background with a single dark, winding linear feature running diagonally across the scene. Along this dark linear feature, three short, straight bridge segments are visible where the line slightly narrows or is interrupted. One bridge lies in the upper central area, another is slightly above it toward the upper center, and a third medium-sized bridge is located in the upper-right portion of the image. The bridges appear as small, straight dark bars aligned with the underlying dark linear feature against the speckled lighter surroundings. | [
{
"obj_id": 2,
"referring_sentence": "The medium-sized bridge located at the upper-right edge of the dark winding linear feature is the bridge near the right side of the image.",
"obj_cls": "bridge",
"obj_corner": [
0.92578125,
0.12890625,
0.95703125,
0.12890625,
0.9570... | [
{
"ques_id": 0,
"question": "What is the main man-made structure type visible in this SAR image?",
"type": "object category",
"answer": "bridges"
},
{
"ques_id": 1,
"question": "How many bridges are visible along the dark winding linear feature?",
"type": "object quantity",
"answ... | 0000254.png |
This SAR image shows a mostly dark background with scattered bright speckles and several bright, rectangular tank signatures. On the lower left side, six large tanks are arranged in a compact grid pattern forming three rows and two columns along the image edge. Near the top center, a single large tank stands apart from the clustered group, appearing isolated in the otherwise sparse area. Overall, the scene highlights a concentrated tank formation on the lower left and one separated tank in the upper middle region. | [
{
"obj_id": 6,
"referring_sentence": "A single large, bright tank structure is located near the top center of the image, clearly separated from all other tanks that are grouped in the lower left.",
"obj_cls": "tank",
"obj_corner": [
0.453125,
0.00390625,
0.57421875,
0.0039062... | [
{
"ques_id": 0,
"question": "How many tanks are visible in the entire image?",
"type": "object quantity",
"answer": "7 tanks"
},
{
"ques_id": 1,
"question": "What object category is clustered in a grid pattern at the lower left of the image?",
"type": "object category",
"answer":... | 0000256.jpg |
This SAR image shows a mostly dark area with scattered bright radar returns, forming clustered patterns along the left and upper edges. Eight tanks are distributed from the lower-left corner up toward the top edge, with several medium-sized tanks aligned in a loose column along the left side and a larger tank slightly above the center-left. Another medium-sized tank appears near the top edge toward the right, separated from the cluster along the left side. The central region of the image is relatively empty compared with the brighter, tank-filled margins. | [
{
"obj_id": 8,
"referring_sentence": "A medium-sized tank is located near the top edge of the image slightly right of center, standing apart from the other tanks along the left side.",
"obj_cls": "tank",
"obj_corner": [
0.60546875,
0.00390625,
0.69921875,
0.00390625,
0.... | [
{
"ques_id": 0,
"question": "What type of military vehicle appears multiple times along the left side of the image?",
"type": "object category",
"answer": "tanks"
},
{
"ques_id": 1,
"question": "How many tanks are visible in the entire image?",
"type": "object quantity",
"answer"... | 0000257.jpg |
This SAR image shows a mostly dark scene with a single bright medium-sized ship located in the top-right corner. The ship forms a compact rectangular shape near the image edge, standing out clearly against the otherwise empty background. No other prominent objects or structures are visible in the scene. | [
{
"obj_id": 0,
"referring_sentence": "A medium-sized bright ship is positioned in the extreme top-right corner of the image against the dark background.",
"obj_cls": "ship",
"obj_corner": [
0.90625,
0,
0.99609375,
0,
0.99609375,
0.08203125,
0.90625,
0.... | [
{
"ques_id": 0,
"question": "What is the main object visible in the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "Where is the ship located within the image?",
"type": "object position",
"answer": "top-right corner"
},
{
"ques_id": 2... | 0000258.jpg |
This SAR image shows a noisy dark background with a single bright, medium-sized ship located along the left edge of the scene. The ship appears as an elongated white shape extending from the upper left area downward, clearly separated from the surrounding speckled background. No other distinct large objects are visible besides this isolated vessel. | [
{
"obj_id": 0,
"referring_sentence": "A single medium-sized bright ship lies along the left edge of the image, extending vertically from the upper left region toward the center against the dark speckled background.",
"obj_cls": "ship",
"obj_corner": [
0.00390625,
0.02734375,
0.2265... | [
{
"ques_id": 0,
"question": "What is the main object visible along the left edge of the image?",
"type": "object category",
"answer": "ship"
},
{
"ques_id": 1,
"question": "How many ships are visible in this SAR image?",
"type": "object quantity",
"answer": "one"
},
{
"qu... | 0000261.jpg |
End of preview.
This repo contains text annotations for SARDet100k.
-Training set contains annotations for 36,469 remote sensing images with detailed captions, 46,864 object refers, and 182,292 visual question-answer pairs.
Referring objects per category: ship: 25,559 bridge: 10,529 aircraft: 7,492 harbor: 1,482 car: 700 tank: 662
-Test set contains annotations for 10,720 remote sensing images with detailed captions, 14,459 object refers, and 53,585 visual question-answer pairs.
Referring objects per category: ship: 7,602 aircraft: 4,171 bridge: 2,353 harbor: 225 car: 80 tank: 28
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