SPD Siamese Neural Network for skeleton-based hand gesture recognition

February 2022
Engineering and Numerical Tools
Communications avec actes dans un congrès international
Auteurs : Mohamed Sanim Akremi (IBISC), Rim Slama (LINEACT), Hedi Tabia (IBISC)
Conférence : International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, 4 February 2022

This article proposes a new learning method for hand gesture recognition from 3D hand skeleton sequences. We introduce a new deep learning method based on a Siamese network of Symmetric Positive Definite (SPD) matrices. We also propose to use the Contrastive Loss to improve the discriminative power of the network. Experimental results are conducted on the challenging Dynamic Hand Gesture (DHG) dataset. We compared our method to other published approaches on this dataset and we obtained the highest performances with up to 95,60% classification accuracy on 14 gestures and 94.05% on 28 gestures.