Update README.md

README.md

@@ -109,7 +109,7 @@ dataset/
 - 📂 **Scene Folders** (`{scene_uuid}/`): Each folder represents one scene with a unique UUID identifier
 - 🖼️ **RGB Images** (`*_rgb.png`): Color-rendered images of the scene from different viewpoints (512×512)
 - 📏 **Depth Maps** (`*_depth.png`): Depth information for each pixel with range 0-20, stored as 16-bit PNG
-- 🎨 **Segmentation Maps** (`*_seg.png`): Instance segmentation masks where each object is represented by an integer starting from 0, following the order of objects in the corresponding `{scene_uuid}.json` file
+- 🎨 **Segmentation Maps** (`*_seg.png`): Instance segmentation masks where each object is represented by an integer starting from 0, following the order of objects in the corresponding `{scene_uuid}.json` file (1 is plane)
 - 📊 **Metadata** (`metadata.json`): Rendering information for each view, including camera intrinsics and extrinsics for all 20 views
 - 🗂️ **Geometry Index** (`geometry/geometry.json`): Index file mapping all object UUIDs to their corresponding file paths
 - ☁️ **Object Point Clouds** (`geometry/sample/*/*.npz`): NPZ files containing object point clouds (20,480 points × 6 dimensions), where the first 3 dimensions are XYZ coordinates and the last 3 dimensions are normal vectors, organized by archive number