Improvement of OpenGL-based Rendering for Computer-Generated Rainbow Hologram

Abstract

For practical 3-D computer-generated holograms (CGH), it is important to display shaded surface model images like computer graphics (CG). Therefore, we have developed a simple process that is used to obtain 3-D data for CGH from two CG images. The first image is a shaded CG image. The second image is a depth-cued image, i.e., image intensity is modulated by the depth of the object. In order to render these two images, we have implemented our proposed method on OpenGL. OpenGL includes not only support for HSRM but also texture mapping, and alpha-blend. Therefore, in this report, we show the effectiveness of the proposed method for texture mapping and alpha-blend.