After making sure all the prerequisites described above are in place, follow these steps to implement the data extraction
在确保上面描述的所有先决条件都满足以后，遵循以下步骤来实现数据提取
Some key techniques are included, such as skin detection, face detection, object area segmentation, image features extraction, the design of classifier and the implement of filter based on browser.
本文采用的技术包括：皮肤检测、人脸检测、目标区域分割、敏感图像特征提取、分类器设计及过滤器在浏览器上的实现等。
Then implement binary image feature extraction to acquire digital information and eigenvectors.
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。
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