期刊论文

Qin, Jiaohua

英文

计算机、材料和连续体(英文)

1546-2218

2019

58

3

665-677

10.32604/cmc.2019.05683

This work is supported by the National Natural Science Foundation of China (No. 61772561), the Key Research & Development Plan of Hunan Province (No. 2018NK2012), the Postgraduate Research and Innovation Project of Hunan Province (No. CX2018B447), the Postgraduate Science and Technology Innovation Foundation of Cent ral South University of Forestry and Technology (20183027), the Key Laboratory for Dig ital Dongting Lake Basin of Hunan Province.

本校为第一且通讯机构

As the first barrier to protect cyberspace, the CAPTCHA has made significant contributions to maintaining Internet security and preventing malicious attacks. By researching the CAPTCHA, we can find its vulnerability and improve the security of CAPTCHA. Recently, many studies have shown that improving the image preprocessing effect of the CAPTCHA, which can achieve a better recognition rate by the state-of-the-art machine learning algorithms. There are many kinds of noise and distortion in the CAPTCHA images of this experiment. We propose an ada...