Computer-generated holograms considering background reflection on various object shapes with reflectance distributions

Abstract

Computer-generated hologram (CGH) is a one of 3-D display technologies, and it reconstructs natural and virtual objects. However, improvement of the reality of reconstructed images is necessary for reconstructing complex and clear scenes like computer graphics. We have studied about the rendering techniques for CGH, and proposed the method considering background reflections and reflectance distributions. The background reflections and reflectance distributions are the characteristics of reflection. Metallic objects and reflected scenes were reconstructed by considering these. In this paper, we improved the previous works for express complex scenes. The proposed method considered the background reflections and reflectance distributions on the curved surface such as convex and concave mirrors. By using the phase transformation, the background reflections and reflectance distributions on it with some roughness are generated. We performed that the background reflections and reflectance distributions on the convex and concave mirrors with roughness are actually obtained through computational and optical reconstructions.