2016/06/15 by Matthias Korn, Maik Stange, Korn, Matthias +15
Computer Science · Engineering · #Advanced Vision and Imaging #Augmented Reality #Augmented Reality (swd: 4715802-5) #Computer Graphics and Visualization Techniques #Fisheye Epipolar Geometry #High Dynamic Range #High dynamic Range (swd: 4790204-8) #Informatik (DDC 004) #Robotics and Sensor-Based Localization
paper · doi:10.20385/1860-2037/4.2007.12
openalex publication_date 2024/11/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
Adding virtual objects to real environments plays an important role in todays computer graphics: Typical examples are virtual furniture in a real room and virtual characters in real movies. For a believable appearance, consistent lighting of the virtual objects is required. We present an augmented reality system that displays virtual objects with consistent illumination and shadows in the image of a simple webcam. We use two high dynamic range video cameras with fisheye lenses permanently recording the environment illumination. A sampling algorithm selects a few bright parts in one of the wide angle images and the corresponding points in the second camera image. The 3D position can then be calculated using epipolar geometry. Finally, the selected point lights are used in a multi pass algorithm to draw the virtual object with shadows. To validate our approach, we compare the appearance and shadows of the synthetic objects with real objects.