<p>Stereo matching plays a fundamental role in 3D perception; however, most existing methods mainly rely on spatial-domain features and often suffer from blurred boundaries and insufficient structural representation. To address these issues, we propose WTSNet, a novel stereo matching network that integrates wavelet transform and superpixel segmentation to enhance feature representation. Specifically, a Wavelet Transform-based attention Module (WTM) is designed to capture multi-frequency contextual information, while a Superpixel Segmentation Module (SSM) preserves local structural details for more accurate disparity estimation near object boundaries. By jointly exploiting frequency-domain cues and structure-aware priors, WTSNet effectively models both global scene geometry and fine-grained local features. Experimental results show that WTSNet achieves End-Point Errors (EPE) of 0.45 pixels on KITTI 2012 and 0.73 pixels on KITTI 2015 after 300 training epochs, outperforming representative methods such as TANet under the same setting. These results demonstrate the effectiveness and competitiveness of the proposed method on challenging stereo benchmarks.</p>

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WTSNet: An accurate stereo matching network based on wavelet transform and superpixel segmentation

  • Haiming Qu,
  • Yunhui Luo,
  • Guiling Hu,
  • Chongbao Zhao,
  • Minxuan He,
  • Mingyu Shang,
  • Qianqian Xu

摘要

Stereo matching plays a fundamental role in 3D perception; however, most existing methods mainly rely on spatial-domain features and often suffer from blurred boundaries and insufficient structural representation. To address these issues, we propose WTSNet, a novel stereo matching network that integrates wavelet transform and superpixel segmentation to enhance feature representation. Specifically, a Wavelet Transform-based attention Module (WTM) is designed to capture multi-frequency contextual information, while a Superpixel Segmentation Module (SSM) preserves local structural details for more accurate disparity estimation near object boundaries. By jointly exploiting frequency-domain cues and structure-aware priors, WTSNet effectively models both global scene geometry and fine-grained local features. Experimental results show that WTSNet achieves End-Point Errors (EPE) of 0.45 pixels on KITTI 2012 and 0.73 pixels on KITTI 2015 after 300 training epochs, outperforming representative methods such as TANet under the same setting. These results demonstrate the effectiveness and competitiveness of the proposed method on challenging stereo benchmarks.