Fingerprint image pre-processing has five parts: filtration in gray-scale image, binarization, filtration in binary image, thinning and filtration in thinning image.
指纹图像的预处理又可以分为灰度图滤波去噪、二值化、二值化图像去噪、细化和细化后去噪五个部分。
A fingerprint image segmentation algorithm based on frequency of gray scale and 8-direction image is proposed.
提出基于灰度值频数和遍历八方向的指纹图像分割算法。
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