Interaction in Augmented Reality by Means of Z-buffer Based Collision Detection

摘要

We propose a new interaction method in AR (augmented reality) using a depth sensor and a collision detection method with the Z-buffer. The method generates 3D models of the real world in real-time and performs interaction between the real and virtual world. In order to provide the real-time collision detection between the models of real world and those of virtual world, we have developed a detection method called Cyber Radar. This technique uses two sets of depth values of the Z-buffer that is generated through the orthographic projection. One is obtained through rendering the virtual space from the sensor object toward a target point. This set does not have the depth values of the sensor object. Another one is obtained through rendering only the sensor object in the reverse direction. From these two depth value sets, we obtain the distance between the sensor object and others for each pixel. This technique requires only one or two rendering processes andit is independent from the complexity of object's shape,deformation or motion. In this paper, we evaluate the interaction using this method and report the problems to be solved.