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color_num_captcha's Introduction

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破解比较简单的纯数字验证码，没必要爬上千张样本再搞个cnn网络训练，用常规的传统算法效果通常都ok。

验证码样式

步骤： 1.根据下方文字提示在图中找到对应颜色的数字
2.分割数字（膨胀腐蚀，寻找最小边界框）
3.分割出的单数字图像归一化，上knn算法，算法中的距离定义为，测试样本与训练样本灰度值不同的像素点的数量
（bn_label文件夹是训练集）

部分训练集图片样式

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