1 research outputs found
Audio Captcha Recognition Using RastaPLP Features by SVM
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.Comment: 9 pages, 4 figure