Saliency detection via background and foreground NULL (cas 101051-09-6) space learning

Add time:08/25/2019    Source:sciencedirect.com

In this paper, we present a novel bottom-up salient object detection approach by exploiting the relationship between the saliency detection and the NULL (cas 101051-09-6) space learning. A key observation is that saliency of an image segment can be estimated by measuring the distance to the single point, which represents the background or foreground salient samples in the null spaces. We apply the null Foley–Sammon transformation to model the null spaces of the background samples or foreground salient samples, where the potentially large and complex intra-class variations of the samples are totally removed and the specific features of the respective classes are represented by a single point. Afterward, we formulate the separation of the saliency regions from the background as a distance measurement to this single point in the null space. An optimization algorithm is devised to fuse the background samples based saliency map and foreground samples based saliency map. Results on five benchmark datasets show that the proposed method achieves superior performance compared with the newest state-of-the-art methods in terms of different evaluation metrics, especially for complex natural images.

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