Handling Photographic Imperfections and Aliasing in Augmented Reality

In video see-through augmented reality, virtual objects are overlaid over images delivered by a digital video camera. One particular problem of this image mixing process is the fact that the visual ap-pearance of the computer-generated graphics differs strongly from the real background image. In typical augmented reality systems, standard real-time rendering techniques are used for displaying vir-tual objects. These fast, but relatively simplistic methods create an artificial, almost “plastic-like ” look for the graphical elements. In this paper, methods for incorporating two particular camera image effects in virtual overlays are described. The first effect is camera image noise, which is contained in the data delivered by the CCD chip used for capturing the real scene. The second effect is motion blur, which is caused by the temporal integration of color intensities on the CCD chip during fast movements of the camer