Audio Captcha Recognition Using RastaPLP Features by SVM

Ahmet Faruk Cakmak, Muhammet Balcilar
1/8/2019
cs.LGcs.SDeess.AS

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Abstract

Nowadays, CAPTCHAs are computer generated tests that human can pass but current computer systems can not. They have common usage in various web services in order to be able to detect a human from computer programs autonomously. In this way, owners can protect their web services from bots. In addition to visual CAPTCHAs which consist of distorted images, mostly test images, that a user must write some description about that image, there are a significant amount of audio CAPTCHAs as well. Briefly, audio CAPTCHAs are sound files which consist of human sound under heavy noise where the speaker pronounces a bunch of digits consecutively. Generally, in those sound files, there are some periodic and non-periodic noises to get difficult to recognize them with a program but not for a human listener. We gathered numerous randomly collected audio file to train and then test them using our SVM algorithm to be able to extract digits out of each conversation.

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Cite this paper

@article{cakmak2019audio,
  title  = {Audio Captcha Recognition Using RastaPLP Features by SVM},
  author = {Ahmet Faruk Cakmak and Muhammet Balcilar},
  year   = {2019},
  eprint = {1901.02153},
  archivePrefix = {arXiv},
  url    = {https://arxiv.org/abs/1901.02153}
}

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