Learning Selective Mutual Attention and Contrast for RGB-D Saliency Detection

• URL: http://arxiv.org/abs/2010.05537v1
• Date: Mon, 12 Oct 2020 08:50:10 GMT
• Title: Learning Selective Mutual Attention and Contrast for RGB-D Saliency Detection
• Authors: Nian Liu, Ni Zhang, Ling Shao, Junwei Han
• Abstract summary: How to effectively fuse cross-modal information is the key problem for RGB-D salient object detection. Many models use the feature fusion strategy but are limited by the low-order point-to-point fusion methods. We propose a novel mutual attention model by fusing attention and contexts from different modalities.
• Score: 145.4919781325014
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: How to effectively fuse cross-modal information is the key problem for RGB-D salient object detection. Early fusion and the result fusion schemes fuse RGB and depth information at the input and output stages, respectively, hence incur the problem of distribution gap or information loss. Many models use the feature fusion strategy but are limited by the low-order point-to-point fusion methods. In this paper, we propose a novel mutual attention model by fusing attention and contexts from different modalities. We use the non-local attention of one modality to propagate long-range contextual dependencies for the other modality, thus leveraging complementary attention cues to perform high-order and trilinear cross-modal interaction. We also propose to induce contrast inference from the mutual attention and obtain a unified model. Considering low-quality depth data may detriment the model performance, we further propose selective attention to reweight the added depth cues. We embed the proposed modules in a two-stream CNN for RGB-D SOD. Experimental results have demonstrated the effectiveness of our proposed model. Moreover, we also construct a new challenging large-scale RGB-D SOD dataset with high-quality, thus can both promote the training and evaluation of deep models.

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