OBJ CUT

In this paper we present a principled Bayesian method for detecting and segmenting instances of a particular object category within an image, providing a coherent methodology for combining top down and bottom up cues. The work draws together two powerful formulations: pictorial structures (PS) and Markov random fields (MRFs) both of which have efficient algorithms for their solution. The resulting combination, which we call the Object Category Specific MRF, suggests a solution to the problem that has long dogged MRFs namely that they provide a poor prior for specific shapes. In contrast, our model provides a prior that is global across the image plane using the PS. We develop an efficient method, OBJ CUT, to obtain segmentations using this model. Novel aspects of this method include an efficient algorithm for sampling the PS model, and the observation that the expected log likelihood of the model can be increased by a single graph cut. Results are presented on two object categories, c...

• Type: Conference
• Year: 2005
• Where: CVPR
• Authors: M. Pawan Kumar, Philip H. S. Torr, Andrew Zisserman
• Keywords: Category Specific Image, Category Specific Mrf, Computer Vision, CVPR 2005, Object Category, Particular Object Category, Principled Bayesian Method