A methodology for palm vein image enhancement and visualization
Min Chun Peng, Chongyang Wang, Tong Chen, Guangyuan Liu · 2016
Palm vein recognition is a developing biometric identification technology. It can be used in physical security and information security for selective control of access to a place or resource. Prior to the palm vein recognition, vein enhancement is generally required for a better recognition. In this paper, we propose a vein enhancement method combining Karhunen-Loeve (KL) transform and hue-preserving color image enhancement technology. Experimental results show that the proposed method is robust to shadow affect, can give better visualization results, and can significantly improve the contrast and contour details of image (the contrast ratio increases by 2.3%, edge intensity increases by 8.8%, and definition increases by 66.9%) comparing to the traditional enhancement methods.