Occlusion handling using moving volume and ray casting techniques for augmented reality systems

Obtaining the correct occlusion relationship between real objects and virtual objects is vital for improving augmented reality technology. In this paper, we propose a novel occlusion handling method using moving volume and ray casting techniques. Our method is divided into two steps. In the first step, we obtain the volume of the corresponding physical space and arbitrarily move the volume to extend the reconstruction area. In the second step, we calculate the 3D coordinates of each pixel in the scene and re-project the rendered objects to the same 3D coordinates system. Correct occlusion relationships are obtained by comparing the z coordinates of real and virtual objects. Several experiments are performed to validate the performance of the proposed method. The experimental results indicate that our method can correctly and rapidly handle occlusion.