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Based on chain code, an improved Hough detection method for head detection is proposed, with which moving regions of objects are determined. During tracking process, we present a tri-tracking method (tri-tracker), on-line trained by positive and negative candidates, for tracking objects. The tracker trains three support vector machines (SVMs) initialised with a small number of labelled frames and...
Proposed is a pixel-pattern-based texture feature (PPBTF) for realtime facial expression recognition. Grey-scale images are transformed into pattern maps where edges and lines are used for characterising facial texture. Based on the pattern map, a feature vector is constructed. Adaboost and a support vector machine (SVM) are adopted. Experiments on the Cohn-Kanade database illustrate that the PPBTF...
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