Visual Saliency Transformer

• URL: http://arxiv.org/abs/2104.12099v1
• Date: Sun, 25 Apr 2021 08:24:06 GMT
• Title: Visual Saliency Transformer
• Authors: Nian Liu and Ni Zhang and Kaiyuan Wan and Junwei Han and Ling Shao
• Abstract summary: We develop a novel unified model based on a pure transformer, Visual Saliency Transformer (VST), for both RGB and RGB-D salient object detection (SOD) It takes image patches as inputs and leverages the transformer to propagate global contexts among image patches. Experimental results show that our model outperforms existing state-of-the-art results on both RGB and RGB-D SOD benchmark datasets.
• Score: 127.33678448761599
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recently, massive saliency detection methods have achieved promising results by relying on CNN-based architectures. Alternatively, we rethink this task from a convolution-free sequence-to-sequence perspective and predict saliency by modeling long-range dependencies, which can not be achieved by convolution. Specifically, we develop a novel unified model based on a pure transformer, namely, Visual Saliency Transformer (VST), for both RGB and RGB-D salient object detection (SOD). It takes image patches as inputs and leverages the transformer to propagate global contexts among image patches. Apart from the traditional transformer architecture used in Vision Transformer (ViT), we leverage multi-level token fusion and propose a new token upsampling method under the transformer framework to get high-resolution detection results. We also develop a token-based multi-task decoder to simultaneously perform saliency and boundary detection by introducing task-related tokens and a novel patch-task-attention mechanism. Experimental results show that our model outperforms existing state-of-the-art results on both RGB and RGB-D SOD benchmark datasets. Most importantly, our whole framework not only provides a new perspective for the SOD field but also shows a new paradigm for transformer-based dense prediction models.

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