Salient Object Detection: A Discriminative Regional Feature Integration Approach


Feature integration provides a computational framework for saliency detection, and a lot of hand-crafted integration rules have been developed. In this paper, we present a principled extension, supervised feature integration, which learns a random forest regressor to discriminatively integrate the saliency features for saliency computation. In addition to contrast features, we introduce regional object-sensitive descriptors: the objectness descriptor characterizing the common spatial and appearance property of the salient object, and the image-specific backgroundness descriptor characterizing the appearance of the background of a specific image, which are shown more important for estimating the saliency. To the best of our knowledge, our supervised feature integration framework is the first successful approach to perform the integration over the saliency features for salient object detection, and outperforms the integration approach over the saliency maps. Together with fusing the multi-level regional saliency maps to impose the spatial saliency consistency, our approach significantly outperforms state-of-the-art methods on seven benchmark datasets. We also discuss several followup works which jointly learn the representation and the saliency map using deep learning.

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    They are empirically set to range from 5 to 1800 with increasingly larger gaps. Check our code at for more details.

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    Objectness is a feature vector in this paper and different from the concept objectness in Alexe et al. (2012) where objectness is used to quantify how likely it is for an image window to contain an object of any class.

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    We tested the performance of random forests with 5, 10, 50, 100, 150, 200, and 300 trees.

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    We tested the performance for 3, 5, 10, 15 and 20 features.

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    Note that this observation holds for salient object detection. It might not hold for other saliency detection task, e.g., eye-fixation prediction, in which the contrast feature is perhaps more important.


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This work was supported in part by the National Basic Research Program of China under Grant No. 2015CB351703 and 2012CB316400, and the National Natural Science Foundation of China under Grant No. 91120006 and NSFC (No. 61572264), Huawei Innovation Research Program (HIRP), and CAST young talents plan.

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Correspondence to Jingdong Wang.

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Communicated by Cordelia Schmid.

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Wang, J., Jiang, H., Yuan, Z. et al. Salient Object Detection: A Discriminative Regional Feature Integration Approach. Int J Comput Vis 123, 251–268 (2017).

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  • Salient object detection
  • Data-driven