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Object Recognition by Sequential Figure-Ground Ranking
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DOI：10.1007/s11263-011-0507-2.png)
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Abstract
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We present an approach to visual object-class segmentation and recognition based on a pipeline that combines multiple figure-ground hypotheses with large object spatial support, generated by bottom-up computational processes that do not exploit knowledge of specific categories, and sequential categorization based on continuous estimates of the spatial overlap between the image segment hypotheses and each putative class. We differ from existing approaches not only in our seemingly unreasonable assumption that good object-level segments can be obtained in a feed-forward fashion, but also in formulating recognition as a regression problem. Instead of focusing on a one-vs.-all winning margin that may not preserve the ordering of segment qualities inside the non-maximum (non-winning) set, our learning method produces a globally consistent ranking with close ties to segment quality, hence to the extent entire object or part hypotheses are likely to spatially overlap the ground truth. We demonstrate results beyond the current state of the art for image classification, object detection and semantic segmentation, in a number of challenging datasets including Caltech-101, ETHZ-Shape as well as PASCAL VOC 2009 and 2010.
Keywords:
Object recognition
Semantic segmentation
Learning and ranking
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