From Few to Many: Illumination Cone Models for Face Recognition under Variable Lighting and Pose
IEEE Transactions on Pattern Analysis and Machine Intelligence
Bilateral Filtering for Gray and Color Images
ICCV '98 Proceedings of the Sixth International Conference on Computer Vision
Flash photography enhancement via intrinsic relighting
ACM SIGGRAPH 2004 Papers
Face recognition under varying lighting conditions using self quotient image
FGR' 04 Proceedings of the Sixth IEEE international conference on Automatic face and gesture recognition
Approximate performance analysis of edge preserving filters
IEEE Transactions on Signal Processing
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This paper describes self-quotient referring ε-filter for images under varying lighting conditions. Edge preserving smoothing is a fundamental feature extraction from the image for multimedia applications. ε-filter is a nonlinear filter, which can smooth the image while preserving edge information. The filter design is simple and it can effectively smooth the image. However, when we handle the image under light variation, the contrast of edge part is low in low contrast area, while it is high in high contrast area. Hence, the existing edge-preserving filters cannot preserve the edge information around low contrast area. Our method solves this problem by combining self-quotient filter and ε-filter. To confirm the effectiveness of the proposed method, we conducted some comparison experiments on face beautification.