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RESC-net: reconstruction error as skip connection for stereo matching

RESC-net: reconstruction error as skip connection for stereo matching

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Recently, the stereo matching task has been dramatically promoted by the deep learning methods. Specifically, the encoder–decoder framework with skip connection achieves outstanding performance over others. The skip connection scheme can bring detailed or in other words, residual information for the final prediction, thus improves the performance, which is successfully applied in many other pixel-wise prediction tasks, such as semantic segmentation, depth estimation and so on. In contrast to other tasks, the authors can explicitly obtain the residual information for stereo matching, which is achieved by back-warping the right image and calculating the reconstruction error. The reconstruction error is successfully used as unsupervised loss, but has not been explored for skip connection. In this Letter, the authors show that the reconstruction error in the feature space is very helpful to bring residual information for the final prediction. They validate the effectiveness of using reconstruction error for skip connection by conducting experiments on the KITTI 2015 and Scene Flow datasets. Experiments show that the proposed scheme can improve the performance by a notable margin and achieves the state-of-the-art performance with very fast processing time.

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