Abstract
A technique integrating the bidirectional reflectance distribution function (BRDF) is proposed to generate realistic high-quality colour computer-generated holograms (CGHs). We build on prior work, namely a fast computer-generated holography method for point clouds that handles occlusions. We extend the method by integrating the Phong illumination model so that the properties of the objects' surfaces are taken into account to achieve natural light phenomena such as reflections and shadows. Our experiments show that rendering holograms with the proposed algorithm provides realistic looking objects without any noteworthy increase to the computational cost.
Highlights
Holograms intrinsically offer the most complete representation of the plenoptic function
We will focus on point-based computer-generated holograms (CGHs) algorithms [12, 18], where the 3D scene is represented by a point cloud and the hologram is generated by superpositioning the light emanating from the different points
We have proposed a computer-generated holography technique for acquiring high quality holograms with full parallax support for point cloud datasets
Summary
Holograms intrinsically offer the most complete representation of the plenoptic function. The summation index L denotes the number of light sources, while the hat on the vectors indicates that the vectors are unit vectors These shading models utilized in computer graphics can be integrated with CGH methods to produce realistic light rendering in 3D scenes. The proposed extension exploits the Phong illumination model in the pre-computation of diffuse and specular look-up tables, so that each point can contribute to the WRP according to the properties of its associated surface. This is enabled by considering the normals of the points of the point cloud, either directly from the point cloud dataset or by computing them.
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