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In recent years, the iris recognition system has been gaining increasing acceptance for applications such as access control and smartphone security. When the images of the iris are obtained under unconstrained conditions, an issue of undermined quality is caused by optical and motion blur, off-angle view (the user's eyes looking somewhere else, not into the front of the camera), specular reflection (SR) and other factors. Such noisy iris images increase intra-individual variations and, as adoi:10.3390/s17122933 pmid:29258217 pmcid:PMC5751551 fatcat:2ldr2vbtunaq5hhpn5f5xoisia