1 LETTER Discriminative Projection Selection Based Face Image Hashing

SUMMARY Face image hashing is an emerging method used in bio-metric verification systems. In this paper, we propose a novel face image hashing method based on a new technique called discriminative projection selection. We apply the Fisher criterion for selecting the rows of a random projection matrix in a user-dependent fashion. Moreover, another contri-bution of this paper is to employ a bimodal Gaussian mixture model at the quantization step. Our simulation results on three different databases demonstrate that the proposed method has superior performance in com-parison to previously proposed random projection based methods. key words: face image hashing, biometric security, privacy 1