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Comparative Performance Evaluation of Gray-Scale and Color Information for Face Recognition Tasks
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Comparative Performance Evaluation of Gray-Scale and Color Information for Face Recognition Tasks
Srinivas Gutta5 , Jeffrey Huang6 , Chengjun Liu7 and Harry Wechsler8 
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Philips Research, 345 Scarborough Rd., Briarcliff Manor, NY 10510, USA |
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Dept. of Computer and Info. Science, Indiana University - Purdue University, 723 West Michigan St. SL 280C, Indianapolis, IN 46202, USA |
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Department of Computer Science, University of Missouri, 318 Computer Center Building, St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri, 63121-4499, USA |
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Department of Computer Science, George Mason University, Fairfax, VA 22030, USA |
Abstract
This paper assesses the usefulness of color information for face recognition tasks. Experimental results using the FERET database
show that color information improves performance for detecting and locating eyes and faces, respectively, and that there is
no significant difference in recognition accuracy between full color and gray-scale face imagery. Our experiments have also
shown that the eigenvectors generated by the red channel lead to improved performance against the eigenvectors generated from
all the other monochromatic channels. The probable reason for this observation is that in the near infrared portion of the
electro-magnetic spectrum, the face is least sensitive to changes in illumination. As a consequence it seems that the color
space as a whole does not improve performance on face recognition but that when one considers monochrome channels on their
own the red channel could benefit both learning the eigenspace and serving as input to project on it.
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