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Adaptive Median Filtering Algorithm Based on Divide and Conquer and Its Application in CAPTCHA Recognition

Wentao Ma1, Jiaohua Qin1,*, Xuyu Xiang1, Yun Tan1, Yuanjing Luo1, Neal N. Xiong2

College of Computer Science and Information Technology, Central South University of Forestry & Technology, Changsha, 410114, China.
Department of Mathematics and Computer Science, Northeastern State University, Oklahoma, 74464, USA.

* Corresponding Author: Jiaohua Qin. Email: email.

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