title: Fast computation of hologram patterns of a 3D object using run-length encoding and novel look-up table methods.
abstract: In this paper we propose a new approach for fast generation of computer-generated holograms (CGHs) of a 3D object by using the run-length encoding (RLE) and the novel look-up table (N-LUT) methods. With the RLE method, spatially redundant data of a 3D object are extracted and regrouped into the N-point redundancy map according to the number of the adjacent object points having the same 3D value. Based on this redundancy map, N-point principle fringe patterns (PFPs) are newly calculated by using the 1-point PFP of the N-LUT, and the CGH pattern for the 3D object is generated with these N-point PFPs. In this approach, object points to be involved in calculation of the CGH pattern can be dramatically reduced and, as a result, an increase of computational speed can be obtained. Some experiments with a test 3D object are carried out and the results are compared to those of the conventional methods.
authors.affiliation: 3D Display Research Center, Department of Electronic Engineering, Kwangwoon University, Seoul, South Korea. sckim@kw.ac.kr
authors.forename: Seung-Cheol
authors.initials: SC
authors.lastname: Kim
authors.forename: Eun-Soo
authors.initials: ES
authors.lastname: Kim