骨龄自动识别大致分为四个阶段：手腕骨图像的预处理、图像增强、图像特征提取和图像特征匹配。
Bone age automatic assessment can be divided into four periods: preprocessing of X-ray hand-wrist image, image contrast enhancement, feature extraction and feature matching.
立体视觉中最大的困难是对应点的寻找，即需要匹配二幅或更多幅立体图像对之间的特征。
The major difficulty in stereo vision is the correspondence problem that requires matching features between two or more stereo images.
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。
Fingerprint identification module includes the preprocessing of fingerprint, feature extraction, the classing of fingerprint as well as matching, the establishment of fingerprint storehouse.
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