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Author manuscript, published in "12th European Conference on Computer Vision (ECCV'12) (2012)" N-tuple Color Segmentation for Multi-View Silhouette Extraction

By Abdelaziz Djelouah, Jean-sébastien Franco, Edmond Boyer, François Le Clerc and Patrick Pérez


Abstract. We present a new method to extract multiple segmentations of an object viewed by multiple cameras, given only the camera calibration. We introduce the n-tuple color model to express inter-view consistency when inferring in each view the foreground and background color models permitting the final segmentation. A color n-tuple is a set of pixel colors associated to the n projections of a 3D point. The first goal is set as finding the MAP estimate of background/foreground color models based on an arbitrary sample set of such n-tuples, such that samples are consistently classified, in a soft way, as ”empty ” if they project in the background of at least one view, or ”occupied ” if they project to foreground pixels in all views. An Expectation Maximization framework is then used to alternate between color models and soft classifications. In a final step, all views are segmented based on their attached color models. The approach is significantly simpler and faster than previous multi-view segmentation methods, while providing results of equivalent or better quality.

Year: 2012
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