docs/annotation_format.md

MANUS-HaGRID Annotation Format

Each WebDataset sample contains a .json metadata member plus available multimodal files for that sample.

Per-Sample JSON in Shards

The shard-local .json member records source id, split, gesture label when available, and available_files. The public manifest adds release-level source and license fields.

Public Manifest Fields

{
  "manus_sample_id": "v2_test_grabbing_00000001",
  "config": "hagrid_v2",
  "split": "test",
  "source_dataset": "HaGRIDv2",
  "source_version": "HaGRIDv2",
  "source_split": "test",
  "source_image_id": "grabbing_00000001",
  "source_license_id": "hagrid-specific-cc-by-sa-4.0-variant",
  "source_license_name": "HaGRID-specific Creative Commons Attribution-ShareAlike 4.0 variant",
  "contains_source_pixels": true,
  "processing_pipeline_version": "manus-hagrid-v1.0",
  "available_modalities": ["full_rgb", "full_depth", "hand_rgb", "hand_depth", "mesh_front"]
}

Modalities

• full_rgb.png: full-scene RGB image.
• full_depth.png: full-scene depth map.
• hand_rgb.png: hand-region RGB crop, when available.
• hand_depth.png: hand-region depth crop.
• hand_bbox.json / hand_depth_bbox.json: crop bounding boxes.
• bbox.json, normal.json, normal_oop.json: available source annotations.
• vertices.json: hand mesh vertices or related mesh metadata.
• mesh_front.png, mesh_back.png, mesh_left.png, mesh_right.png, mesh_top.png, mesh_bottom.png: canonical mesh renderings where available.
• six_view_bbox_*.json, extra_view_image_*, extra_view_bbox_*: additional view metadata where available.

Use available_files in each sample and available_modalities in the manifest to handle split-specific missing modalities.