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Lexing Xie, Patrick Pérez. Slightly Supervised Learning of Part-Based Appearance Models. In IEEE Workshop on Learning in Computer Vision and Pattern Recognition, Washington D. C, June 2004.

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We extend a GMM-based approach for learning part-based appearance models of object categories, to the unsupervised case where positive examples are corrupted with clutter. To this end, we derive an original version of EM which is able to fit one GMM per class based on partially labeled data. We also allow ourselves a small fraction of un-corrupted positive examples, thus obtaining an effective, yet cheap, {\em slightly} supervised learning. Proposed technique allows as well a saliency-based ranking and selection of learnt mixture components. Experiments show that both the semi-supervised GMM fitting with side information and the component selection are effective in identifying salient patches in the appearance of a class of objects. They are thus promising tools to learn class-specific models and detectors similar to those by Weber {et al.}, but at a lower computational cost, while accommodating larger numbers of atomic parts


Lexing Xie

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   Author = {Xie, Lexing and Pérez, Patrick},
   Title = {Slightly Supervised Learning of Part-Based Appearance Models},
   BookTitle = {IEEE Workshop on Learning in Computer Vision and Pattern Recognition},
   Address = {Washington D. C},
   Month = {June},
   Year = {2004}

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