Navjot rathour  <br/><br/>
Recognition method of text CAPTCH using correlation and principle component analysis  

 - pp59-67 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>completely automated public turing test to tell computers and humans apart [CAPTCHA]<br/>Optical character recognition [OCR] <br/>Prinicipal component analysis [PCA] <br/>Image processing