Fingerprint identification module includes the preprocessing of fingerprint, feature extraction, the classing of fingerprint as well as matching, the establishment of fingerprint storehouse.

指纹识别模块包括指纹图像的预处理，特征提取，分类，匹配以及指纹库的建立。

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In writer identification (WI), writing styles are always compared by character matching, while image preprocessing and normalization are very important for matching.

笔迹鉴别多用匹配方法比较字符的书写风格，而字符图像的预处理和归一化对匹配是非常重要的。

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A personal identification system based on iris patterns is composed of iris image acquisition, image preprocessing, feature extraction and coding, matching and recognition.

基于虹膜的识别系统由以下几个部分构成：虹膜获取、虹膜图像预处理、虹膜图像特征提取、匹配与识别。

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