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• W2734943823 abstract "Many computer vision problems are formulated as the optimization of a cost function. This approach faces two main challenges: (i) designing a cost function with a local optimum at an acceptable solution, and (ii) developing an efficient numerical method to search for one (or multiple) of these local optima. While designing such functions is feasible in the noiseless case, the stability and location of local optima are mostly unknown under noise, occlusion, or missing data. In practice, this can result in undesirable local optima or not having a local optimum in the expected place. On the other hand, numerical optimization algorithms in high-dimensional spaces are typically local and often rely on expensive first or second order information to guide the search. To overcome these limitations, this paper proposes Discriminative Optimization (DO), a method that learns search directions from data without the need of a cost function. Specifically, DO explicitly learns a sequence of updates in the search space that leads to stationary points that correspond to desired solutions. We provide a formal analysis of DO and illustrate its benefits in the problem of 3D point cloud registration, camera pose estimation, and image denoising. We show that DO performed comparably or outperformed state-of-the-art algorithms in terms of accuracy, robustness to perturbations, and computational efficiency." @default.
• W2734943823 created "2017-07-21" @default.
• W2734943823 creator A5003508045 @default.
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• W2734943823 date "2019-04-01" @default.
• W2734943823 modified "2023-10-03" @default.
• W2734943823 title "Discriminative Optimization: Theory and Applications to Computer Vision" @default.
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• W2734943823 doi "https://doi.org/10.1109/tpami.2018.2826536" @default.
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