Capture-Execution Isomorphism

A term from China's robotics-data industry: building the capture device to match the robot's end-effector so recorded data transfers directly, with no retargeting.

Capture-execution isomorphism (采执同构) is a term that has become common in China's embodied-data industry in recent years. It means the capture device — a gripper or glove a human holds or wears, or a leader arm used for teleoperation — is built with the same kinematic structure, degrees of freedom, sensor layout, and even camera viewpoint as the robot's actual end-effector (its gripper or dexterous hand). That way the recorded joint angles, touch signals, and video can be used directly as the robot's observations and actions, skipping motion retargeting (converting human motion into robot motion) and the errors that conversion introduces, and narrowing the embodiment gap between different robots. ALOHA's matched leader-follower arms, and UMI's design that lets its handheld gripper share the wrist-camera viewpoint with the robot, reflect a similar idea. Companies such as PaXini Technology market it as a selling point, advertising a 1:1 physical match between their capture glove and their end-effector — “what you capture is what you deploy.” The tradeoff is that the capture device is tied to one specific end-effector; switching to a different robotic hand usually means switching capture devices too.

ExamplePaXini's PXCap III three-fingered capture glove and its PXDex III three-fingered end-effector are designed with matching sensor layout, linkages, and joint degrees of freedom, so touch and joint data captured with the glove can be used directly on a robot fitted with the matching end-effector.

Also called

Collection-Execution Isomorphism

Related

Robot-free (Embodiment-free) Data Collection · Universal Manipulation Interface · Motion Retargeting · Embodiment Gap · Leader-Follower Teleoperation · PaXini Tech

Sources

帕西尼 PXCap III 三指数据采集手套（官网） (Chinese)
数据决定上限：25家国内具身智能数据采集厂商盘点（艾邦机器人） (Chinese)
UMI: Universal Manipulation Interface 项目主页 (Chinese)

As of

2026-09