Residual attentive feature learning network for salient object detection

Neurocomputing(2022)

Cited 6|Views14
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Abstract
Salient object detection is one of the basic challenging problems in the area of computer vision. Traditional saliency models usually utilize handcrafted features and various prior cues to locate and segment salient objects from complicated surroundings. Recently, with the development of convolutional neural networks (CNNs), most of existing approaches explore the combination of multi-level feature maps for improving detection performance. However, how to learn powerful feature is still a challenge, and the multi-level and multi-scale feature maps are usually aggregated without distinction. In this paper, we propose a novel salient object detection approach named residual attentive feature learning (RAFL) to uniformly highlight salient objects and effectively suppress background noises. In our proposed RAFL, a global perception (GP) module is designed to obtain rich global features of input image. A pyramid feature extraction (PFE) module is utilized to capture the rich context of side-output information. Moreover, an attentive feature selection (AFS) module is applied to refine these side-output features and generate attentive features, so as to find out the important feature channels having high responses to the salient objects. Finally, a residual feature learning (RFL) module is proposed to make the shallow layers generate more accurate saliency maps with the help of the deep layers which contain more global semantic information. Experimental results show that our proposed approach performs favorably against 18 state-of-the-art representative methods on five benchmark datasets.
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Key words
Salient object detection,Saliency detection,Attention,Residual learning,Multi-level feature integration
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