关键词: 方向图, 二值化, 特征点提取

Abstract: A method to extract fingerprint minutiaes was proposed. Acquired binary image, we thinned the ridges and valleys respectively,then extracted ridge bifurcations and valley bifurcations as the key minutiaes from the ridge thinned image and valley thinned image. These minutiaes are more exact and the spurious bifurcations can be removed easily. Experimental results show that the amount of the key minutiaes is less,and it is helpful to fingerprint matching phase.

Key words: direction image, binarization, minutiae extraction