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Simulation YiDun-CAPTCHA
A dataset of 10000 CAPTCHA images with 5 characters and 256x256 size -
DingXiang-CAPTCHA
A dataset of 10000 CAPTCHA images with 5 characters and 256x256 size -
YiDun-CAPTCHA
A dataset of 10000 CAPTCHA images with 5 characters and 256x256 size -
CASIA-HWDB
The CASIA-HWDB dataset contains 3.9 million images of isolated characters that belong to 7356 classes.