Microsoft's update of its OneNote for Windows 8.1 app includes some significant changes.
Multiple Snap Views in Windows 8.1 are now fully enabled. OneNote now also supports the Share Charm in 8.1, letting you copy a website or information from an app directly into a new note in the app.
Most significant is a new Camera Scan feature and optical character recognition (OCR). The updated feature offers improved scanning of documents and whiteboards so that images look like they were scanned directly into a page.
Camera Scan automatically rotates, straightens, crops, sharpens, and remove shadows from images after they’re taken so they fit into a note.Source article