Mobile AR live annotation for printed materials.

Nowadays, mobile devices has become a prevalent platform for Augment Reality (AR). And in the field of publication, annotation plays an important role in solving the problem of connection between virtual 3D objects and books. However, most related annotation programs are operated on PC systems. So we propose a novel application for document based AR on mobile devices. Compared with programs in PC, the app would face the challenge of the slower microprocessor. In order to solve this problem, we applied the method of LLAH in PC into the system of mobile devices. This application allows users to annotate text documents through mobile devices. Users can utilize the devices' camera to capture the document, add some annotations, and register them to our system. When reviewing the document again, the annotation stored in the system will be retrieved, and overlay at the corresponding position by semitransparent rectangle.