Analysis of Palm Vein Image Quality and Recognition with Different Distance

It is normal that the distance between palm and camera lens is different in contactless recognition systems. Most of the prior work has only emphasized on issues of preprocessing, feature extraction and match. But the recognition affect due to the different distance of image is very few concerned. This paper presents the relationship between palm distance and the palmvein recognition performance from image clarity of ROI(Region of Interest), image structural difference and match results based on low-resolution palmvein images. Experimental results show that, differences of image clarity and structure are larger while distance of palmvein distance becomes large, also show that the match results becomes large, which will to some extent increase the false rejection.