Research and design of digital character-based CAPTCHA decoder
Sun Yu-zhe · Computer Engineering and Applications Journal · 2007
CAPTCHA Decoder technology is used in multi-send technology.The paper presents a CAPTCHA Decoder System based on template matching.Grid feature template,crossing points feature template and improved dynamic template as well as hole number feature are used in the system.In order to improve the decoding accuracy,a weighted template is proposed and a statistical approach is adopted to obtain the weight.Tests show that the system’s decoding accuracy is 100%.