README.md

metadata

license: mit
tags:
  - Embodied-AI
  - Robotic manipulation
  - Vision-Language-Action model
  - Teleoperation
  - Dexterous Hand
task_categories:
  - robotics
language:
  - en
size_categories:
  - 1K<n<10K
preview: false

VITRA Teleoperation Dataset

Dataset Summary

This dataset contains real-world robot teleoperation demonstrations collected using a 7-DoF robotic arm equipped with a dexterous hand and a head-mounted RGB camera. Each episode provides synchronized numerical state/action data and video recordings. The dataset is used for finetuning in the project VITRA: Scalable Vision-Language-Action Model Pretraining for Robotic Manipulation with Real-Life Human Activity Videos

Project page: https://microsoft.github.io/VITRA/

---

Hardware Setup

• Robot Arm: Realman Arm (7-DoF)
  URDF: https://github.com/RealManRobot/rm_models/tree/main/RM75/urdf/RM75-6F
• Dexterous Hand: XHand (12-DoF)
• Head Camera: Intel RealSense D455

---

Data Modalities and Files

Each episode consists of two synchronized files:

• <episode_id>.h5 — numerical data including robot states, actions, kinematics, and metadata
• <episode_id>.mp4 — RGB video stream recorded from the head-mounted camera

The two files correspond one-to-one and share the same episode identifier.

---

Coordinate Frames

The dataset uses the following coordinate frames:

• arm_base
  Root frame of the arm kinematic chain, defined in the URDF.
• ee_urdf
  End-effector frame defined in the URDF (joint7).
• hand_mount
  Rigid mounting frame of the dexterous hand, including flange offset.
  This frame is rotationally aligned with the human hand axis illustrated in Figure 1 (identity rotation).
• head_camera
  Optical center of the head-mounted RGB camera.

Figure 1. The hand_mount frame axes. Axis directions follow the human hand definition illustrated in the figure.

---

Arm Availability and Masks

The dataset format is compatible with both right-arm-only episodes and dual-arm episodes. The currently released dataset contains only right-arm data.

• Missing arms/hands are filled with zeros to keep array shapes consistent.
• Availability is indicated by:
  • /meta/has_left, /meta/has_right (episode-level)
  • /mask/* (frame-level)

---

HDF5 File Structure

Each .h5 file follows the structure below:

/
├── meta/
│   ├── instruction                     string
│   ├── video_path                      string
│   ├── frame_count                     int # T
│   ├── fps                             float
│   ├── has_left                        bool
│   ├── has_right                       bool
│
├── kinematics/
│   ├── left_ee_urdf_to_hand_mount      (4, 4) float64
│   ├── right_ee_urdf_to_hand_mount     (4, 4) float64
│   ├── head_camera_to_left_arm_base    (4, 4) float64
│   └── head_camera_to_right_arm_base   (4, 4) float64
│
├── observation/
│   └── camera/
│       └── intrinsics                   (3, 3) float64
│
├── state/
│   ├── left_arm_joint                   (T, Na) float64  # joint positions (rad)
│   ├── right_arm_joint                  (T, Na) float64
│   ├── left_hand_mount_pose             (T, 6)  float64  # hand_mount pose in arm_base: [x,y,z,rx,ry,rz]
│   ├── right_hand_mount_pose            (T, 6)  float64  # hand_mount pose in arm_base: [x,y,z,rx,ry,rz]
|   ├── left_hand_mount_pose_in_cam      (T, 6)  float64  # hand_mount pose in head_camera: [x,y,z,rx,ry,rz]
|   ├── right_hand_mount_pose_in_cam     (T, 6)  float64  # hand_mount pose in head_camera: [x,y,z,rx,ry,rz]
│   ├── left_hand_joint                  (T, Nh) float64
│   └── right_hand_joint                 (T, Nh) float64
│
├── action/
│   ├── left_arm_joint                   (T, Na) float64  # target joint positions (rad)
│   ├── right_arm_joint                  (T, Na) float64  # target joint positions (rad)
│   ├── left_hand_joint                  (T, Nh) float64  # target joint positions (rad)
│   └── right_hand_joint                 (T, Nh) float64  # target joint positions (rad)
│
└── mask/
    ├── left_arm                         (T,) bool
    ├── right_arm                        (T,) bool
    ├── left_hand                        (T,) bool
    └── right_hand                       (T,) bool

---

Pose Representation

For all *_hand_mount_pose entries, poses are represented as:

[x, y, z, rx, ry, rz]

where:

• (x, y, z) denotes the position of the hand_mount frame expressed in arm_base (meters)
• (rx, ry, rz) denotes the rotation vector in axis–angle representation (radians)

---

Transformation Notation

A homogeneous transformation matrix is denoted by T (4×4).

• Subscript: reference frame (the coordinate system used for expression)
• Superscript: target frame (the frame being described)

All subscripts and superscripts are written on the right-hand side of T.

Example: T^{hand\_mount}_{arm\_base} represents the pose of hand_mount expressed in the arm_base frame.

---

Kinematic Relations and Episode-Specific Transforms

Different flange hardware or camera mounting configurations may be used across episodes or arms. As a result:

All kinematic and extrinsic transforms must be read from the current episode and must not be assumed constant.

The hand mounting pose expressed in arm_base is computed as:

$$T_{arm\mathrm{\_}base}^{hand\mathrm{\_}mount}=T_{arm\mathrm{\_}base}^{ee\mathrm{\_}urdf}\cdot T_{ee\mathrm{\_}urdf}^{hand\mathrm{\_}mount}T^\{hand\backslash \_mount\}\_\{arm\backslash \_base\}\; =\; T^\{ee\backslash \_urdf\}\_\{arm\backslash \_base\}\; \backslash cdot\; T^\{hand\backslash \_mount\}\_\{ee\backslash \_urdf\}$$

where:

• T^{ee\_urdf}_{arm\_base} is obtained via forward kinematics (FK) from the arm joint positions, corresponding to the URDF end-effector frame (joint7).
• T^{hand\_mount}_{ee\_urdf} is a fixed, episode-specific transform provided under /kinematics/*_ee_urdf_to_hand_mount.

Camera extrinsics may also vary across episodes.
Transforms under /kinematics/head_camera_to_*_arm_base should likewise be read from the current episode and must not be assumed constant. The hand mounting pose expressed in head_camera frame (i.e. *_hand_mount_pose_in_cam) is:

$$T_{head\mathrm{\_}camera}^{hand\mathrm{\_}mount}=(T_{arm\mathrm{\_}base}^{head\mathrm{\_}camera}{)}^{-1}\cdot T_{arm\mathrm{\_}base}^{hand\mathrm{\_}mount}T^\{hand\backslash \_mount\}\_\{head\backslash \_camera\}\; =\; (T^\{head\backslash \_camera\}\_\{arm\backslash \_base\})^\{-1\}\; \backslash cdot\; T^\{hand\backslash \_mount\}\_\{arm\backslash \_base\}$$

where:

• T^{head\_camera}_{arm\_base} is episode-specific transform provided under /kinematics/head_camera_to_*_arm_base

---