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Published in:
2018 | OriginalPaper | Chapter
Recognizing the Adhesion Hollow Characters Based on the Closed Cutting Algorithm
Authors : Chunyong Yin, Kaiwen Zhu, Lian Xia, Jin Wang
Published in: Advances in Computer Science and Ubiquitous Computing
Publisher: Springer Singapore
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Abstract
With the development of network security, CAPTCHA identification is becoming a hot research topic. In this paper, we study the adhesion hollow character in the CAPTCHA, and put forward a method to identify the hollow characters which are adhered to each other in the CAPTCHA. The method is based on the principle of virus invading cells, and uses the particle swarm algorithm to find the closed space and fill it. We determine the location of the character by the histogram of number of layers, and then recognize the characters that are cut out. Experimental results show that the proposed method can be effectively used to identify the hollow characters in the CAPTCHA, and the recognition rate is 30.1%.