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The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
sim_camera: struct<name: string, pos: list<item: double>, R_world_from_cv: list<item: list<item: double>>, fovy_ (... 12 chars omitted)
  child 0, name: string
  child 1, pos: list<item: double>
      child 0, item: double
  child 2, R_world_from_cv: list<item: list<item: double>>
      child 0, item: list<item: double>
          child 0, item: double
  child 3, fovy_deg: double
sim_cup_xy: list<item: double>
  child 0, item: double
sim_plate_xy: list<item: double>
  child 0, item: double
sim_grasp_point: list<item: double>
  child 0, item: double
plate_minus_cup_cm: list<item: double>
  child 0, item: double
max_reach_m: double
min_target_height_above_table_m: double
camera_matrix: list<item: list<item: double>>
  child 0, item: list<item: double>
      child 0, item: double
image_size: list<item: int64>
  child 0, item: int64
instruction: string
duration_s: double
fps: int64
depth_scale: double
dropped_frames: int64
frames: int64
dist_coeffs: list<item: double>
  child 0, item: double
to
{'instruction': Value('string'), 'fps': Value('int64'), 'frames': Value('int64'), 'dropped_frames': Value('int64'), 'duration_s': Value('float64'), 'image_size': List(Value('int64')), 'camera_matrix': List(List(Value('float64'))), 'dist_coeffs': List(Value('float64')), 'depth_scale': Value('float64')}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2951, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2461, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2486, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 547, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 430, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              sim_camera: struct<name: string, pos: list<item: double>, R_world_from_cv: list<item: list<item: double>>, fovy_ (... 12 chars omitted)
                child 0, name: string
                child 1, pos: list<item: double>
                    child 0, item: double
                child 2, R_world_from_cv: list<item: list<item: double>>
                    child 0, item: list<item: double>
                        child 0, item: double
                child 3, fovy_deg: double
              sim_cup_xy: list<item: double>
                child 0, item: double
              sim_plate_xy: list<item: double>
                child 0, item: double
              sim_grasp_point: list<item: double>
                child 0, item: double
              plate_minus_cup_cm: list<item: double>
                child 0, item: double
              max_reach_m: double
              min_target_height_above_table_m: double
              camera_matrix: list<item: list<item: double>>
                child 0, item: list<item: double>
                    child 0, item: double
              image_size: list<item: int64>
                child 0, item: int64
              instruction: string
              duration_s: double
              fps: int64
              depth_scale: double
              dropped_frames: int64
              frames: int64
              dist_coeffs: list<item: double>
                child 0, item: double
              to
              {'instruction': Value('string'), 'fps': Value('int64'), 'frames': Value('int64'), 'dropped_frames': Value('int64'), 'duration_s': Value('float64'), 'image_size': List(Value('int64')), 'camera_matrix': List(List(Value('float64'))), 'dist_coeffs': List(Value('float64')), 'depth_scale': Value('float64')}
              because column names don't match

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HChallenge: mug pick-and-place recordings

165 recordings of my hand picking up a mug and putting it on a plate, with the mug and plate moved to a new random position by hand before each one. Recorded with an Intel RealSense D405 (1280 × 720 colour + aligned depth, 30 fps) looking at a table with an ArUco marker that defines the table frame.

Code, processing pipeline and results: https://github.com/mi-robotics/HChallenge · https://mi-robotics.github.io/HChallenge/

mug_pnp_dataset/<YYYYmmdd_HHMMSS>/   100 episodes whose sim replay succeeds (train / val / test)
mug_pnp_failed/<YYYYmmdd_HHMMSS>/    65 episodes whose sim replay fails
  raw recording
  color.mp4      colour video, 30 fps
  depth.mkv      depth aligned to colour, lossless uint16 (FFV1); metres = value × depth_scale
  frames.csv     per frame: index, camera frame number, timestamp (ms)
  meta.json      camera intrinsics, depth_scale, frame counts
  processed (scripts/preprocess_data.sh; kept episodes and the 46 replayed failed ones)
  sim.npz        the robot's replay per 20 Hz step: actions, state, wrist and third-person camera images
  flow_sim.npz   hand and mug action flow on the robot's clock
  video_sim.mp4  the real video on the robot's clock (one frame per sim step)
  scene.json     the matching sim scene

The train / val / test / failed lists are data/splits.json in the GitHub repository.

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