然后对二值化的图像进行特征提取，获得疵病的数字化信息和特征向量。
Then implement binary image feature extraction to acquire digital information and eigenvectors.
采用自适应门限进行阈值分割，得到二值化的图像；利用聚类的方法去掉噪声点。
Binaryzation image is obtained through adaptive threshold segmentation and noise is removed by sorting method.
在图像预处理阶段，我们主要是对手势字母图像进行平滑、锐化和二值化的处理。
In the process of image preprocessing there are several image operations such as image smooth, image sharpen and image segment.
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