WAFT-Stereo: Warping-Alone Field Transforms for Stereo Matching

We introduce WAFT-Stereo, a simple and effective warping-based method for stereo matching. WAFT-Stereo demonstrates that costvolumes, a common design used in many leading methods, are not nec-essary for strong performance and can be replaced by warping with im-proved efficiency. WAFT-Stereo ranks first on ETH3D (BP-0.5), Middle-bury (RMSE), and KITTI (all metrics), reducing the zero-shot error by81% on ETH3D, while being 1.8−6.7× faster than competitive methods.Code and model weights are available at https://github.com/princeton-vl/WAFT-Stereo.