Open Access

ARTICLE

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

Wentao Ma¹, Jiaohua Qin^1,*, Xuyu Xiang¹, Yun Tan¹, Yuanjing Luo¹, Neal N. Xiong²

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

* Corresponding Author: Jiaohua Qin. Email: .