Self-Supervised Learning of Domain Invariant Features for Depth Estimation

• URL: http://arxiv.org/abs/2106.02594v3
• Date: Tue, 8 Jun 2021 09:02:07 GMT
• Title: Self-Supervised Learning of Domain Invariant Features for Depth Estimation
• Authors: Hiroyasu Akada, Shariq Farooq Bhat, Ibraheem Alhashim, Peter Wonka
• Abstract summary: We tackle the problem of unsupervised synthetic-to-realistic domain adaptation for single image depth estimation. An essential building block of single image depth estimation is an encoder-decoder task network that takes RGB images as input and produces depth maps as output. We propose a novel training strategy to force the task network to learn domain invariant representations in a self-supervised manner.
• Score: 35.74969527929284
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We tackle the problem of unsupervised synthetic-to-realistic domain adaptation for single image depth estimation. An essential building block of single image depth estimation is an encoder-decoder task network that takes RGB images as input and produces depth maps as output. In this paper, we propose a novel training strategy to force the task network to learn domain invariant representations in a self-supervised manner. Specifically, we extend self-supervised learning from traditional representation learning, which works on images from a single domain, to domain invariant representation learning, which works on images from two different domains by utilizing an image-to-image translation network. Firstly, we use our bidirectional image-to-image translation network to transfer domain-specific styles between synthetic and real domains. This style transfer operation allows us to obtain similar images from the different domains. Secondly, we jointly train our task network and Siamese network with the same images from the different domains to obtain domain invariance for the task network. Finally, we fine-tune the task network using labeled synthetic and unlabeled real-world data. Our training strategy yields improved generalization capability in the real-world domain. We carry out an extensive evaluation on two popular datasets for depth estimation, KITTI and Make3D. The results demonstrate that our proposed method outperforms the state-of-the-art both qualitatively and quantitatively. The source code and model weights will be made available.

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