The basis of digital image processing: includes binarization, histogram, median filtering, etc.
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includes binarization
包括二值化
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Preprocessing finishes the prophase job to make it easier to do the following recognizing work, which includes binarization, smoothness and refinement such image standardization operations.
预处理完成的是前期工作，对获取的待识别图像进行二值化、平滑、细化等图像规范化操作使得更易进行下步的识别操作。
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