Skeleton-Based Activity Recognition: Preprocessing and Approaches

Research in Activity Recognition is one of the thriving areas in the field of computer vision. This development comes into existence by introducing the skeleton-based architectures for action recognition and related research areas. By advancing the research into real-time scenarios, practitioners find it fascinating and challenging to work on human action recognition because of the following core aspects—numerous types of distinct actions, variations in the multimodal datasets, feature extraction, and view adaptiveness. Moreover, hand-crafted features and depth sequence models cannot perform efficiently on the multimodal representations. Consequently, recognizing many action classes by extracting some smart and discriminative features is a daunting task. As a result, deep learning models are adapted to work in the field of skeleton-based action recognition. This chapter entails all the fundamental aspects of skeleton-based action recognition, such as—skeleton tracking, representation, preprocessing techniques, feature extraction, and recognition methods. This chapter can be a beginning point for a researcher who wishes to work in action analysis or recognition based on skeleton joint-points.