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Employing Bilinear Fusion and Saliency Prior Information for RGB-D Salient Object Detection
<span title="">2021</span>
<i title="Institute of Electrical and Electronics Engineers (IEEE)">
<a target="_blank" rel="noopener" href="https://fatcat.wiki/container/sbzicoknnzc3tjljn7ifvwpooi" style="color: black;">IEEE transactions on multimedia</a>
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Multi-modal feature fusion and saliency reasoning are two core sub-tasks of RGB-D salient object detection. However, most existing models employ linear fusion strategies (e.g., concatenation) for multi-modal feature fusion and use a simple coarse-to-fine structure for saliency reasoning. Despite their simpleness, they can neither fully capture the cross-modal complementary information nor exploit the multi-level complementary information among the cross-modal features at different levels. To
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... ress these issues, a novel RGB-D salient object detection model is presented, where we pay special attention to the aforementioned two sub-tasks. Concretely, a multi-modal feature interaction module is first presented to explore more interactions between the unimodal RGB and depth features. It helps to capture their cross-modal complementary information by jointly using some simple linear fusion strategies and bilinear fusion ones. Then, a saliency prior information guided fusion module is presented to exploit the multi-level complementary information among the fused cross-modal features at different levels. Instead of employing a simple convolutional layer for the final saliency prediction, a saliency refinement and prediction module is designed to better exploit those extracted multilevel cross-modal information for RGB-D saliency detection. Experimental results on several benchmark datasets verify the effectiveness and superiority of the proposed framework over some state-of-the-art methods. Index Terms-RGB-D salient object detection, bilinear fusion strategy, saliency prior information guided fusion, saliency refinement and prediction.
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