Simon Willison’s Weblog

OCR and Neural Nets in JavaScript. John dissects the brilliant Greasemonkey script that solves simple captchas using the canvas element and HTML5’s getImageData API.

Posted 25th January 2009 at 12 am

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canvas 38 captchas 8 getimagedata 1 greasemonkey 54 javascript 723 john-resig 32 ocr 25

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