Abstract
In this paper, we propose a discriminative learning-based method for recovering the depth of a scene from multiple defocused images. The proposed method consists of a discriminative learning phase and a depth estimation phase. In the discriminative learning phase, we formalize depth from defocus (DFD) as a multi-class classification problem which can be solved by learning the discriminative metrics from the synthetic training set by minimizing a criterion function. To enhance the discriminative and generalization performance of the learned metrics, the criterion takes both within-class and between-class variations into account, and incorporates margin constraints. In the depth estimation phase, for each pixel, we compute the N discriminative functions and determine the depth level according to the minimum discriminant value. Experimental results on synthetic and real images show the effectiveness of our method in providing a reliable estimation of the depth of a scene.
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Wu, Q., Wang, K., Zuo, W., Chen, Y. (2011). Depth from Defocus via Discriminative Metric Learning. In: Lu, BL., Zhang, L., Kwok, J. (eds) Neural Information Processing. ICONIP 2011. Lecture Notes in Computer Science, vol 7064. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24965-5_76
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DOI: https://doi.org/10.1007/978-3-642-24965-5_76
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