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• W1567487277 abstract "Estimating geometry from images is at the core of many computer vision applications, whether it concerns the imaging geometry, the geometry of the scene, or both. Examples include image mosaicking, pose estimation, multi baseline stereo, and structure from motion. All these problems can be modeled probabilistically and translate into well-understood statistical estimation problems, provided the correspondence between measurements in the different images is known. I will show that, if the correspondence is not known, the statistically optimal estimate for the geometry can be obtained using the expectation-maximization (EM) algorithm. In contrast to existing techniques, the EM algorithm avoids the estimation bias associated with computing a single “best” set of correspondences, but rather considers the distribution over all possible correspondences consistent with the data. While the latter computation is intractable in general, I show that it can be approximated well in practice using Markov chain Monte Carlo sampling. As part of this, I have designed an efficient sampler specifically tuned to the correspondence problem. The resulting Monte Carlo EM approach represents the first truly multiview algorithm for geometric estimation with unknown correspondence. This is especially relevant in the structure from motion domain, where the state of the art relies on robust estimation of two or three-view geometric constraints. In addition, I will show that the probabilistic approach I propose allows for a seamless and principled way of integrating prior knowledge, appearance models, and statistical models for occlusion and clutter." @default.
• W1567487277 created "2016-06-24" @default.
• W1567487277 creator A5005247523 @default.
• W1567487277 creator A5066710774 @default.
• W1567487277 creator A5087336025 @default.
• W1567487277 date "2001-01-01" @default.
• W1567487277 modified "2023-09-23" @default.
• W1567487277 title "Monte carlo em for data-association and its applications in computer vision" @default.
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