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Sign languages generally consist of a sequence of upper body gestures and are cooperative processes among various parts such as the hands, arms, and face. Therefore, the dynamics of the parts as well as the holistic appearance of the upper body and individual parts are essential for robust recognition. In this paper, a global–local representation (GLR) module is proposed to boost the spatiotemporal feature modeling. The GLR module is composed of global shift and local shift along the height, width, and temporal dimensions. Specifically, the global shift is applied to the entire feature map for holistic representation, while the local shift restricts itself to local patches to capture detailed features. Furthermore, a novel cross-scale aggregation module is designed to combine the global and local information in different dimensions. Extensive experimental results on three large-scale benchmarks, including WLASL, INCLUDE and LSA64, demonstrate that the proposed method achieves state-of-the-art recognition performance. [ABSTRACT FROM AUTHOR]

Analysis of human interaction is one important research topic of human motion analysis. It has been studied either using first-person vision (FPV) or third-person vision (TPV). However, the joint learning of both types of vision has so far attracted little attention. One of the reasons is the lack of suitable datasets that cover both FPV and TPV. In addition, existing benchmark datasets of either FPV or TPV have several limitations, including the limited number of samples, participant subjects, interaction categories, and modalities. In this work, we contribute a large-scale human interaction dataset, namely FT-HID dataset. FT-HID contains pair-aligned samples of first-person and third-person visions. The dataset was collected from 109 distinct subjects and has more than 90K samples for three modalities. The dataset has been validated by using several existing action recognition methods. In addition, we introduce a novel multi-view interaction mechanism for skeleton sequences, and a joint learning multi-stream framework for first-person and third-person visions. Both methods yield promising results on the FT-HID dataset. It is expected that the introduction of this vision-aligned large-scale dataset will promote the development of both FPV and TPV, and their joint learning techniques for human action analysis. [ABSTRACT FROM AUTHOR]