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SAM3Dvid

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SAM3Dvid
File size: 2,547 Bytes
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{
 "format_version": 1,
 "split": "train",
 "clips_per_shard": 100,
 "num_clips": 100,
 "num_frames": 32,
 "image_size": [
  512,
  512
 ],
 "rgb_encoding": "JPEG quality 100, 4:4:4",
 "voxels_file": "voxels_train.npz",
 "num_assets": 228,
 "conventions": {
  "camera": "opencv (x right, y down, z forward)",
  "world": "right-handed, Z up",
  "T_cw": "world -> camera, 4x4, row-major",
  "pose": "x_c = R_co @ (s_co * x_o) + t_co, with R_co = R_cw @ R_wo and t_co = R_cw @ t_wo + t_cw",
  "arrays": "row-major, matrices as nested lists",
  "pixel_centers": "integer coordinates",
  "units": "arbitrary scene units, no metric scale",
  "voxels": "bool 64^3 surface occupancy, np.packbits (C order, big-endian bits) of the flattened grid",
  "visible": "uint8, 0 = background, k = object k (1-based, matches objects[k-1])"
 },
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}