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Please use this identifier to cite or link to this item: http://hdl.handle.net/1812/339

Authors: R.Saravanan, Usha Sridhar
Keywords: Automatic Feature Detection
Image Processing
Face Recognition
Adaptive Thresholding
Issue Date: 2007
Abstract: Detection of eye-centers, a set of key facial feature points, in a bespectacled face has been a challenge in automated face recognition systems because glasses and frames can significantly alter the intensity profile in the region around the eyes. The altered profile usually is caused not only by the spectacle frames, but also by reflections from glass surfaces, which are dependent on illumination conditions and the tints in the glass, leading to poor accuracy in feature point detection. The problem of robust feature point detection in the presence of spectacles in combination of pose and illumination variations has not been fully addressed. This paper describes a new algorithm to extract the eye-centers accurately in the presence of spectacles. The algorithm uses image analysis in combination with a robust rule engine derived from elements of geometrical structure of a face. The novelty of the algorithm stems from the use of local adaptive thresholding to find the lip region, and then filtering out infeasible combinations of shape objects in the eye region using the lip as a reference. Further localization of eye-pupil center in the algorithm delivers eye-center locations with high accuracy. The method handles both variations in illumination and in-depth rotations up to 20 degrees. The paper presents results from the application of the algorithm on a corpus of 939 bespectacled faces obtained from many different public databases. The results show that in 96% of the images the algorithm locates eyecenters within 3 pixels of the pupil found with manual effort
Description: Proceeding of the 2nd International Conference on Informatics (Informatics 2007), 27th-28th November 2007, Hilton Petaling Jaya Hotel, Petaling Jaya, Selangor, Malaysia. T1-8 - T1-13
URI: http://dspace.fsktm.um.edu.my/handle/1812/339
Appears in Collections:Informatics 2007

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