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Gray Scale Kernel has been recently introduced for image recognition tasks. The kernel is proved to be positive definite and thus can be used in Support Vector Machine (SVM) based recognition [1]. In this paper, Profile Histogram Intersection (PHI) kernels, Detail Histogram Intersection (DHI) kernels and Susan Detail Histogram Intersection (SDHI) kernel function are proposed which based on traditional Gray Scale Kernel. In experiments on classification of face images, our SDHI kernel shows higher classification accuracy than PHI and DHI kernels. © 2010 IEEE.
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