Deep RGB-D Saliency Detection Without Depth

Yuan Fang Zhang, Jiangbin Zheng, Wenjing Jia, Wenfeng Huang, Long Li, Nian Liu, Fei Li, Xiangjian He

Research output: Journal PublicationArticlepeer-review

10 Citations (Scopus)


The existing saliency detection models based on RGB colors only leverage appearance cues to detect salient objects. Depth information also plays a very important role in visual saliency detection and can supply complementary cues for saliency detection. Although many RGB-D saliency models have been proposed, they require to acquire depth data, which is expensive and not easy to get. In this paper, we propose to estimate depth information from monocular RGB images and leverage the intermediate depth features to enhance the saliency detection performance in a deep neural network framework. Specifically, we first use an encoder network to extract common features from each RGB image and then build two decoder networks for depth estimation and saliency detection, respectively. The depth decoder features can be fused with the RGB saliency features to enhance their capability. Furthermore, we also propose a novel dense multiscale fusion model to densely fuse multiscale depth and RGB features based on the dense ASPP model. A new global context branch is also added to boost the multiscale features. Experimental results demonstrate that the added depth cues and the proposed fusion model can both improve the saliency detection performance. Finally, our model not only outperforms state-of-the-art RGB saliency models, but also achieves comparable results compared with state-of-the-art RGB-D saliency models.

Original languageEnglish
Pages (from-to)755-767
Number of pages13
JournalIEEE Transactions on Multimedia
Publication statusPublished - 2022
Externally publishedYes


  • Convolutional neural network
  • depth estimation
  • feature fusion
  • saliency detection

ASJC Scopus subject areas

  • Signal Processing
  • Media Technology
  • Computer Science Applications
  • Electrical and Electronic Engineering


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