GelSight Wedge: Measuring High-Resolution 3D Contact Geometry with a Compact Robot Finger

• URL: http://arxiv.org/abs/2106.08851v1
• Date: Wed, 16 Jun 2021 15:15:29 GMT
• Title: GelSight Wedge: Measuring High-Resolution 3D Contact Geometry with a Compact Robot Finger
• Abstract summary: GelSight Wedge sensor is optimized to have a compact shape for robot fingers, while achieving high-resolution 3D reconstruction. We show the effectiveness and potential of the reconstructed 3D geometry for pose tracking in the 3D space.
• Score: 8.047951969722794
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Vision-based tactile sensors have the potential to provide important contact geometry to localize the objective with visual occlusion. However, it is challenging to measure high-resolution 3D contact geometry for a compact robot finger, to simultaneously meet optical and mechanical constraints. In this work, we present the GelSight Wedge sensor, which is optimized to have a compact shape for robot fingers, while achieving high-resolution 3D reconstruction. We evaluate the 3D reconstruction under different lighting configurations, and extend the method from 3 lights to 1 or 2 lights. We demonstrate the flexibility of the design by shrinking the sensor to the size of a human finger for fine manipulation tasks. We also show the effectiveness and potential of the reconstructed 3D geometry for pose tracking in the 3D space.

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