MMF‐Net: A novel multi‐feature and multi‐level fusion network for 3D human pose estimation

Abstract Human pose estimation based on monocular video has always been the focus of research in the human computer interaction community, which suffers mainly from depth ambiguity and self‐occlusion challenges. While the recently proposed learning‐based approaches have demonstrated promising performance, they do not fully explore the complementarity of features. In this paper, the authors propose a novel multi‐feature and multi‐level fusion network (MMF‐Net), which extracts and combines joint features, bone features and trajectory features at multiple levels to estimate 3D human pose. In MMF‐Net, firstly, the bone length estimation module and the trajectory multi‐level fusion module are used to extract the geometric size information of the human body and multi‐level trajectory information of human motion, respectively. Then, the fusion attention‐based combination (FABC) module is used to extract multi‐level topological structure information of the human body, and effectively fuse topological structure information, geometric size information and trajectory information. Extensive experiments show that MMF‐Net achieves competitive results on Human3.6M, HumanEva‐I and MPI‐INF‐3DHP datasets.