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A new Adaptive Approach for Histogram based Mouth Segmentation

Authors: Axel Panning, Robert Niese, Ayoub Al-Hamadi, Bernd Michaelis


The segmentation of mouth and lips is a fundamental problem in facial image analyisis. In this paper we propose a method for lip segmentation based on rg-color histogram. Statistical analysis shows, using the rg-color-space is optimal for this purpose of a pure color based segmentation. Initially a rough adaptive threshold selects a histogram region, that assures that all pixels in that region are skin pixels. Based on that pixels we build a gaussian model which represents the skin pixels distribution and is utilized to obtain a refined, optimal threshold. We are not incorporating shape or edge information. In experiments we show the performance of our lip pixel segmentation method compared to the ground truth of our dataset and a conventional watershed algorithm.

Keywords: Image Processing, Segmentation, Feature Extraction, Application

Digital Object Identifier (DOI):

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