INTERACTIVE TECHNIQUES FOR RECTIFYING AND SCROLLING PHOTOS OF DOCUMENTS IN A 3D VIEWPORT

摘要

Systems and methods for providing a user interface to help users rectify and scroll photos of documents. Systems and methods are based on an approach employing a 3D viewport with multi-touch gestures along with scroll bars. Scrolling a rotated photo in a 3D space exhibits some strange and unexpected behaviors; wherein systems and methods solve these problems using trigonometry in 3D and Newton's Method while being fast enough to support real-time interaction.