Abstract
A highly efficient calculation method to synthesize a computer-generated holographic stereogram using a lookup table (LUT) is proposed. The complete phase distribution (CPD) of a spherical wave that is larger than the hologram is precalculated and stored as a LUT. The wavefront converging to each viewpoint can be directly obtained by adding a specific part of the precalculated CPD to the parallax image, instead of computing the wavefronts pixel by pixel in the conventional method. The computation amount and calculation time are effectively reduced to one-third of the conventional method. The working memory size is reduced effectively using the symmetry of the phase distributions of different viewpoints. A simulation and an optical experiment are performed to verify the proposed method.
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