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Data Structure

Observations

observation.state.ee_state (12)

End-effector states of the robot.

  • Computed via forward kinematics (FK) from the root link to the left and right end-effectors.
  • Includes the contribution of the waist.
  • Represented as concatenated poses of both end-effectors.

observation.state.hand_state (12 or 2)

Finger states for both hands. The dimensionality depends on the hand type.

Inspire Hand (range: 0.0 – 1.0, open → close)

Per hand:

  1. Index finger
  2. Middle finger
  3. Ring finger
  4. Little finger
  5. Thumb (open/close)
  6. Thumb (lateral tilt)

BrainCo Hand (range: 0.0 – 1.0, open → close)

Per hand:

  1. Thumb (open/close)
  2. Thumb (lateral tilt)
  3. Index finger
  4. Middle finger
  5. Ring finger
  6. Little finger

Dex1 Hand (range: 5.5 – 0.0, open → close)

Per hand:

  1. Open/close

observation.state.robot_q_current (36)

Current robot configuration.

  • First 7 values:
    • Root position: (x, y, z)
    • Root orientation: quaternion (w, x, y, z)
  • Remaining 29 values:
    • Robot joint positions.

Actions

action.ee_action (12)

Target end-effector states.

  • Defined using forward kinematics (FK) from the root link to both end-effectors.
  • Includes waist motion.

action.hand_cmd (12 or 2)

Commanded finger actions. The dimensionality depends on the hand type.

Inspire Hand (range: 0.0 – 1.0, open → close)

Per hand:

  1. Index finger
  2. Middle finger
  3. Ring finger
  4. Little finger
  5. Thumb (open/close)
  6. Thumb (lateral tilt)

BrainCo Hand (range: 0.0 – 1.0, open → close)

Per hand:

  1. Thumb (open/close)
  2. Thumb (lateral tilt)
  3. Index finger
  4. Middle finger
  5. Ring finger
  6. Little finger

Dex1 Hand (range: 5.5 – 0.0, open → close)

Per hand:

  1. Open/close

action.robot_q_desired (36)

Desired robot configuration.

  • First 7 values:
    • Target root position: (x, y, z)
    • Target root orientation: quaternion (w, x, y, z)
  • Remaining 29 values:
    • Target joint positions.

Acknowledgements

This dataset was created using the LeRobot framework.

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