This API allows you to convert an photo of a document into a scan of a document! You can write your own camera scanner app! Improves quality, cleans up, does perspective transformation - all that to produce amazing results! Check it out yourself!
Learn more about this API
GETDownload the processed image
Corner marks show how to do a perspective transformation. Each corner mark coord is in range [0.0; 1.0] where (0.0; 0.0) is upper left corner. Basically, after transformation a left-upper mark will move to the left-upper corner, etc. You can head over to http://doxcan.com/ and check out how this works.