IMPRESS: Incomplete Human Motion Prediction via Motion Recovery and Structural-Semantic Fusion

Human motion prediction is a key task in computer vision and human-robot interaction, which has received much attention in recent years. However, existing approaches suffer from two issues: 1) They typically rely only on complete data and overlook real-world challenges such as missing observations. 2) Recent works fail to capture the diverse relations among body parts in different action categories, which limits their prediction performance. To address the above problems, we propose a novel Incomplete human Motion Prediction method through motion Re covery and Structure-Semantic fusion (IMPRESS). Specifically, for motion recovery, we introduce a wavelet-based self-attention module. It captures motion details from high-frequency features and extracts global trends from low-frequency components. To enhance the relations among different body parts, we design a structure-semantic fusion graph convolutional network. Moreover, we employ a dual-channel sliding window attention mechanism to capture motion periodicity, enabling smoother predictions. Extensive experiments on two benchmark datasets (Human3.6M, CMU-MoCap) demonstrate that IMPRESS achieves state-of-the-art average prediction performance under both complete and incomplete observations.