Abstract
Mouth region detection is the prerequisite of lipreading.In this paper,an adaptive mouth region detection algorithm was proposed based on multi-color spaces.The algorithm combined color edge detection in RGB color space and threshold segmentation in HSV color space.Furthermore,according to the mouth position of the face,an adaptive lip localization method was introduced to detect the position of mouth baseline automatically.Then the rectangular area of mouth region was detected by projection method.Experimental results show that the proposed algorithm can locate mouth region fast,accurately and robustly.
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