Effects of image preprocessing on face matching and recognition in human observers
This source preferred by Changhong Liu
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Authors: Liu, C.H., Chen, W., Han, H. and Shan, S.
Journal: Applied Cognitive Psychology
Summary: In person identification, recognition failure due to variations of illumination is common. In this study, we employed image-processing techniques to tackle this problem. Participants performed recognition and matching tasks where the face stimuli were either original images or computer-processed images in which shading was weakened via a number of image-processing techniques. The results show that whereas recognition accuracy in a memory task was unaffected, some of the techniques significantly improved the identification performance in a face-matching task. We conclude that relative to long-term face memory, face matching is more susceptible to discrepancy of shading in different images of a face. Reducing the discrepancy by certain preprocessing techniques can facilitate person identification when original face images contain large illumination differences. © 2013 John Wiley & Sons, Ltd.