Twain

• http://www.twain.org/docs/530fe0da85f7511c510004ff/TWAIN-2.3-Spec.pdf
• https://en.wikipedia.org/wiki/TWAIN
• http://www.twainforum.org/
• http://www.codeproject.com/Articles/41709/How-To-Use-Office-2007-OCR-Using-C
• http://www.htmlgoodies.com/beyond/mobile/8-rules-to-follow-when-using-twain-for-your-image-capture-web-app.html
• http://twainscanning.com/category/twain-scanning/

• http://webtwain.org/ocr-a-selected-area-of-an-image-in-javascript/