WAFT: Warping-Alone Field Transforms for Optical Flow

• URL: http://arxiv.org/abs/2506.21526v1
• Date: Thu, 26 Jun 2025 17:47:59 GMT
• Title: WAFT: Warping-Alone Field Transforms for Optical Flow
• Authors: Yihan Wang, Jia Deng,
• Abstract summary: We introduce Warping-Alone Field Transforms (WAFT), a simple and effective method for optical flow.<n>WAFT is similar to RAFT but replaces cost volume with high-resolution warping, achieving better accuracy with lower memory cost.
• Score: 30.98695432299259
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce Warping-Alone Field Transforms (WAFT), a simple and effective method for optical flow. WAFT is similar to RAFT but replaces cost volume with high-resolution warping, achieving better accuracy with lower memory cost. This design challenges the conventional wisdom that constructing cost volumes is necessary for strong performance. WAFT is a simple and flexible meta-architecture with minimal inductive biases and reliance on custom designs. Compared with existing methods, WAFT ranks 1st on Spring and KITTI benchmarks, achieves the best zero-shot generalization on KITTI, while being up to 4.1x faster than methods with similar performance. Code and model weights are available at https://github.com/princeton-vl/WAFT.

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