Effective Rotation-Invariant Point CNN with Spherical Harmonics Kernels

Adrien Poulenard, Marie Julie Rakotosaona, Yann Ponty, Maks Ovsjanikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

62 Scopus citations


We present a novel rotation invariant architecture operating directly on point cloud data. We demonstrate how rotation invariance can be injected into a recently proposed point-based PCNN architecture, on all layers of the network. This leads to invariance to both global shape transformations, and to local rotations on the level of patches or parts, useful when dealing with non-rigid objects. We achieve this by employing a spherical harmonics-based kernel at different layers of the network, which is guaranteed to be invariant to rigid motions. We also introduce a more efficient pooling operation for PCNN using space-partitioning data-structures. This results in a flexible, simple and efficient architecture that achieves accurate results on challenging shape analysis tasks, including classification and segmentation, without requiring data-augmentation typically employed by non-invariant approaches.
Original languageEnglish (US)
Title of host publication2019 International Conference on 3D Vision (3DV)
Number of pages10
ISBN (Print)9781728131313
StatePublished - Oct 31 2019
Externally publishedYes


Dive into the research topics of 'Effective Rotation-Invariant Point CNN with Spherical Harmonics Kernels'. Together they form a unique fingerprint.

Cite this