关键词: 指横纹, Gabor滤波器, 手指轴线, 方向图, 频率投影

Abstract: In order to solve the problem of self-adaptive and accurate segmentation of knuckleprint，this paper brings forward a new segmentation algorithm of knuckleprint based on modified Gabor filter.In the stage of calculation of character direction，this algorithm uses the direction of finger axis as Gbor filter’s direction，which solves the problem of rotation overflow and singular value region in traditional Gabor filter.In the segmentation stage，this algorithm uses certain frequence value to processing characteristics of knuckleprint，which can reduce time-consuming and avoid to calculate with certain projection value of Gbor parameters.Emulation experiment shows that this algorithm not only reduce time-consuming，get rid of noise and hand-shape affection but also robust in different quality images.

Key words: knuckleprint, Gabor filter, finger axis, direction images, frequence projection