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10-10-2019 | Original Article | Issue 3/2020

International Journal of Machine Learning and Cybernetics 3/2020

Unsupervised learning of monocular depth and ego-motion with space–temporal-centroid loss

Journal:
International Journal of Machine Learning and Cybernetics > Issue 3/2020
Authors:
Junning Zhang, Qunxing Su, Pengyuan Liu, Chao Xu, Yanlong Chen
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Abstract

We propose DPCNN (Depth and Pose Convolutional Network), a novel framework for monocular depth with absolute scale and camera motion estimation from videos. DPCNN uses our proposed stereo training examples, in which the spatial and temporal images can be combined more closely, thus providing more priori constraint relationships. In addition, there are two significant features existing in DPCNN: One is that the entire space–temporal-centroid model is established to independently constrain the rotation matrix and the translation vector, so that the spatial and temporal images are collectively limited in a common, real-world scale. The other is to use the triangulation principle to establish a two-channel depth consistency loss, which penalizes inconsistency of the depths estimated from the spatial images and inconsecutive temporal images, respectively. Experiments on the KITTI datasets show that DPCNN achieves the most advanced results in both tasks and outperforms the current monocular methods.

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