| { |
| "$schema": "https://json-schema.org/draft/2020-12/schema", |
| "$id": "https://infactory.ai/schemas/camera-detection/annotation/v1", |
| "title": "Camera Detection Frame Annotation", |
| "description": "Schema for per-frame annotations in the Infactory Camera Detection Dataset. Each record describes the camera characteristics of a single video frame across three orthogonal dimensions: shot scale, camera angle, and camera movement.", |
| "type": "object", |
| "required": [ |
| "frame_id", |
| "source_video", |
| "frame_number", |
| "timestamp_sec", |
| "shot_scale", |
| "shot_scale_code", |
| "camera_angle", |
| "camera_movement", |
| "annotator", |
| "annotation_version" |
| ], |
| "properties": { |
| "frame_id": { |
| "type": "string", |
| "format": "uuid", |
| "description": "Unique identifier for this annotated frame (UUID v4)." |
| }, |
| "source_video": { |
| "type": "string", |
| "description": "Filename of the source video from which this frame was extracted.", |
| "pattern": "^.+\\.(mp4|avi|mov|mkv|webm)$" |
| }, |
| "source_video_id": { |
| "type": "string", |
| "description": "Unique identifier for the source video, if available (e.g., UUID or dataset-specific ID)." |
| }, |
| "frame_number": { |
| "type": "integer", |
| "minimum": 0, |
| "description": "Zero-indexed frame number within the source video." |
| }, |
| "timestamp_sec": { |
| "type": "number", |
| "minimum": 0, |
| "description": "Timestamp of the frame in seconds from the start of the source video." |
| }, |
|
|
| "shot_scale": { |
| "type": "string", |
| "enum": ["ECU", "CU", "MCU", "MS", "MLS", "LS", "ELS", "FS", "IS"], |
| "description": "Primary shot scale classification. See DEFINITIONS.md Section 1 for full definitions." |
| }, |
| "shot_scale_code": { |
| "type": "integer", |
| "enum": [0, 1, 2, 3, 4, 5, 6, 7, 8], |
| "description": "Numeric code for shot scale. Codes 1-7 are ordinal (closest to farthest). 0=FS, 8=IS are non-ordinal." |
| }, |
| "shot_scale_underlying": { |
| "type": ["string", "null"], |
| "enum": ["ECU", "CU", "MCU", "MS", "MLS", "LS", "ELS", null], |
| "description": "When shot_scale is 'FS' (Foreground Shot), this field captures the underlying shot scale of the primary subject behind the foreground element. Null for all other shot_scale values." |
| }, |
|
|
| "camera_angle": { |
| "type": "string", |
| "enum": ["OVH", "HIGH", "NEU", "LOW", "DUTCH"], |
| "description": "Camera angle classification. See DEFINITIONS.md Section 2 for full definitions." |
| }, |
| "camera_angle_vertical_tendency": { |
| "type": ["string", "null"], |
| "enum": ["OVH", "HIGH", "NEU", "LOW", null], |
| "description": "When camera_angle is 'DUTCH', this optional field captures the underlying vertical tendency. Null when camera_angle is not DUTCH." |
| }, |
|
|
| "camera_movement": { |
| "type": "string", |
| "enum": ["STATIC", "PAN", "TILT", "TRACK", "ZOOM_IN", "ZOOM_OUT", "HANDHELD", "CRANE", "AERIAL"], |
| "description": "Camera movement classification based on temporal context around this frame. See DEFINITIONS.md Section 3 for full definitions." |
| }, |
|
|
| "subject_type": { |
| "type": "string", |
| "enum": ["person", "group", "field_of_play", "object", "graphic", "crowd", "venue", "mixed"], |
| "description": "What the primary subject of the frame is. See DEFINITIONS.md Section 4.2." |
| }, |
| "subject_count": { |
| "type": ["integer", "null"], |
| "minimum": 0, |
| "description": "Number of distinct subjects visible when subject_type is 'person' or 'group'. Null when not applicable." |
| }, |
|
|
| "camera_position": { |
| "type": ["string", "null"], |
| "enum": [ |
| "main_center", "main_left", "main_right", |
| "behind_goal", "goal_line_tech", "spider_cam", |
| "sideline", "corner", "inside_goal", |
| "aerial", "tunnel", "studio", "other", null |
| ], |
| "description": "Physical camera position in the venue. Primarily for sports broadcast content. Null when unknown or not applicable. See DEFINITIONS.md Section 4.1." |
| }, |
|
|
| "transition_context": { |
| "type": "string", |
| "enum": ["none", "hard_cut", "dissolve", "wipe", "fade_black", "logo_transition"], |
| "default": "none", |
| "description": "How this frame relates to surrounding editorial transitions. See DEFINITIONS.md Section 4.3." |
| }, |
|
|
| "safe_area": { |
| "type": ["object", "null"], |
| "description": "SMPTE ST 2046-1 safe area compliance. Null when not evaluated.", |
| "properties": { |
| "action_safe": { |
| "type": "boolean", |
| "description": "Subject's key features fall within the Action-Safe zone (inner 93% of frame per SMPTE ST 2046-1)." |
| }, |
| "title_safe": { |
| "type": "boolean", |
| "description": "Subject's key features fall within the Title-Safe zone (inner 90% of frame per SMPTE ST 2046-1)." |
| } |
| }, |
| "required": ["action_safe", "title_safe"] |
| }, |
|
|
| "technical": { |
| "type": "object", |
| "description": "Technical metadata about the source frame.", |
| "properties": { |
| "resolution_width": { |
| "type": "integer", |
| "minimum": 1, |
| "description": "Frame width in pixels." |
| }, |
| "resolution_height": { |
| "type": "integer", |
| "minimum": 1, |
| "description": "Frame height in pixels." |
| }, |
| "frame_rate": { |
| "type": "number", |
| "minimum": 0, |
| "description": "Source video frame rate in frames per second." |
| }, |
| "aspect_ratio": { |
| "type": "string", |
| "description": "Display aspect ratio (e.g., '16:9', '4:3', '21:9')." |
| }, |
| "codec": { |
| "type": ["string", "null"], |
| "description": "Video codec (e.g., 'H.264', 'H.265', 'VP9')." |
| }, |
| "color_space": { |
| "type": ["string", "null"], |
| "description": "Color sampling format (e.g., '4:2:0', '4:2:2', '4:4:4')." |
| }, |
| "bit_depth": { |
| "type": ["integer", "null"], |
| "description": "Bit depth per channel (e.g., 8, 10, 12)." |
| } |
| }, |
| "required": ["resolution_width", "resolution_height", "frame_rate"] |
| }, |
|
|
| "annotator": { |
| "type": "string", |
| "description": "Identifier of the annotator or model that produced this annotation (e.g., 'human_annotator_01', 'model_v1.0', 'gemini_2.0_flash')." |
| }, |
| "annotation_version": { |
| "type": "string", |
| "description": "Version of the annotation schema used (e.g., '1.0.0').", |
| "pattern": "^\\d+\\.\\d+\\.\\d+$" |
| }, |
| "confidence": { |
| "type": ["number", "null"], |
| "minimum": 0.0, |
| "maximum": 1.0, |
| "description": "Model confidence score for the annotation. Null for human annotations. Range [0.0, 1.0]." |
| }, |
| "human_verified": { |
| "type": "boolean", |
| "default": false, |
| "description": "Whether this annotation has been verified by a human reviewer." |
| }, |
| "verification_annotator": { |
| "type": ["string", "null"], |
| "description": "Identifier of the human who verified this annotation. Null if not yet verified." |
| }, |
|
|
| "notes": { |
| "type": ["string", "null"], |
| "description": "Free-text annotator notes for edge cases or ambiguous frames." |
| }, |
|
|
| "domain": { |
| "type": "string", |
| "enum": ["sports_broadcast", "news_broadcast", "cinema", "documentary", "user_generated", "other"], |
| "description": "Content domain of the source material." |
| }, |
| "sport_type": { |
| "type": ["string", "null"], |
| "description": "Specific sport, when domain is 'sports_broadcast' (e.g., 'soccer', 'basketball', 'tennis'). Null otherwise." |
| } |
| }, |
| "additionalProperties": false, |
|
|
| "if": { |
| "properties": { "shot_scale": { "const": "FS" } } |
| }, |
| "then": { |
| "required": ["shot_scale_underlying"] |
| }, |
|
|
| "examples": [ |
| { |
| "frame_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890", |
| "source_video": "GA_ITS_MSA_20241201_JUV_NAP_SIS2.mp4", |
| "source_video_id": "b0558318-3605-4d54-9930-41c77fd4b20a", |
| "frame_number": 1234, |
| "timestamp_sec": 41.13, |
| "shot_scale": "MCU", |
| "shot_scale_code": 3, |
| "shot_scale_underlying": null, |
| "camera_angle": "NEU", |
| "camera_angle_vertical_tendency": null, |
| "camera_movement": "STATIC", |
| "subject_type": "person", |
| "subject_count": 1, |
| "camera_position": "sideline", |
| "transition_context": "none", |
| "safe_area": { |
| "action_safe": true, |
| "title_safe": true |
| }, |
| "technical": { |
| "resolution_width": 1920, |
| "resolution_height": 1080, |
| "frame_rate": 25.0, |
| "aspect_ratio": "16:9", |
| "codec": "H.264", |
| "color_space": "4:2:0", |
| "bit_depth": 8 |
| }, |
| "annotator": "model_v1.0", |
| "annotation_version": "1.0.0", |
| "confidence": 0.94, |
| "human_verified": false, |
| "verification_annotator": null, |
| "notes": null, |
| "domain": "sports_broadcast", |
| "sport_type": "soccer" |
| }, |
| { |
| "frame_id": "f9e8d7c6-b5a4-3210-fedc-ba9876543210", |
| "source_video": "GA_ITS_MSA_20241201_JUV_NAP_SIS2.mp4", |
| "source_video_id": "b0558318-3605-4d54-9930-41c77fd4b20a", |
| "frame_number": 5678, |
| "timestamp_sec": 189.27, |
| "shot_scale": "ELS", |
| "shot_scale_code": 7, |
| "shot_scale_underlying": null, |
| "camera_angle": "HIGH", |
| "camera_angle_vertical_tendency": null, |
| "camera_movement": "PAN", |
| "subject_type": "field_of_play", |
| "subject_count": null, |
| "camera_position": "main_center", |
| "transition_context": "hard_cut", |
| "safe_area": null, |
| "technical": { |
| "resolution_width": 1920, |
| "resolution_height": 1080, |
| "frame_rate": 25.0, |
| "aspect_ratio": "16:9", |
| "codec": "H.264", |
| "color_space": "4:2:0", |
| "bit_depth": 8 |
| }, |
| "annotator": "model_v1.0", |
| "annotation_version": "1.0.0", |
| "confidence": 0.87, |
| "human_verified": true, |
| "verification_annotator": "human_annotator_01", |
| "notes": "Main broadcast camera following open play left to right.", |
| "domain": "sports_broadcast", |
| "sport_type": "soccer" |
| } |
| ] |
| } |
|
|
