A Planar-Symmetric SO(3) Representation for Learning Grasp Detection

Tianyi Ko, Takuya Ikeda, Hiroya Sato, Koichi Nishiwaki

Keywords: Grasp Detection, Rotation Representation, Parallel Gripper

TL;DR: We propose a novel SO(3) representation that can parametrize a pair of planar-symmetric poses with a single parameter set by leveraging the 2D Bingham distribution.

Abstract:

Planar-symmetric hands, such as parallel grippers, are widely adopted in both research and industrial fields.
Their symmetry, however, introduces ambiguity and discontinuity in the SO(3) representation, which hinders both the training and inference of neural network-based grasp detectors.
We propose a novel SO(3) representation that can parametrize a pair of planar-symmetric poses with a single parameter set by leveraging the 2D Bingham distribution.
We also detail a grasp detector based on our representation, which provides a more consistent rotation output.
An intensive evaluation with multiple grippers and objects in both the simulation and the real world quantitatively shows our approach's contribution.

Video: https://youtu.be/24JZ9t7ZcI0

Student Paper: no

Submission Number: 162