This app is the best app to take pictures of document or whiteboards. It take the picture, cleans it up and then adjusts the perspective of the picture as well.
The app also allows one to share the document over many mediums like email, evernote, drive or any other service that you may have installed that can handle pdf documents.
Once we have taken a picture, the next step sometime is to perform an OCR on the picture. Here one of the old time favorite application from Google stable, Goggles comes in handy. Google Goggle along with Translate offers services for OCR and translation as well. Give these apps a spin.