FSTINet: Frequency-Enhanced Spatial-Temporal Integrated Network for Class-Agnostic Motion Prediction
摘要
With the rapid advancement of intelligent driving technology, accurately predicting the motion trajectories of traffic participants in dynamic scenes has become a key challenge in achieving safe and efficient autonomous driving. However, existing methods often struggle with modeling spatio-temporal dependencies and capturing fine-grained dynamic features, especially for high-speed objects. To address these issues, this paper proposes FSTINet, a BEV-based framework that jointly integrates frequency-domain and spatio-temporal information. Two core modules are introduced: the Hierarchical Temporal-Spatial Integrated Module (HTSIM), which combines motion-consistency guided temporal pooling with hierarchical interaction learning to capture multi-scale spatio-temporal dependencies while suppressing noise; and the Frequency-Spatial Fusion Module (FSFM), which leverages a 2D discrete wavelet transform (2D-DWT) to decompose features into high-frequency and low-frequency components, enabling complementary fusion that preserves global semantics and enhances local motion details. Extensive experiments on the challenging nuScenes dataset demonstrate the effectiveness of the proposed method: in low-speed scenarios (speed