A method of calculating full-parallax computer-generated hologram with occlusion and lighting in real time

Kai Wu; Jianhong Wu; Lingyan Shi; Mingliang Yao; Yun Chen; Minjie Hua

doi:10.1117/12.2537603

18 November 2019 A method of calculating full-parallax computer-generated hologram with occlusion and lighting in real time

Kai Wu, Jianhong Wu, Lingyan Shi, Mingliang Yao, Yun Chen, Minjie Hua

Author Affiliations +

Proceedings Volume 11188, Holography, Diffractive Optics, and Applications IX; 111881Y (2019) https://doi.org/10.1117/12.2537603
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

In this paper, a method based on point source and view-window is proposed that covers the features as full parallax, depth and accurate occlusion cue, shading and lighting, and ensures the computational efficiency in the meantime, to calculate the on-the-fly computer-generated holograms. With the acceleration of graphics processing unit (GPU), a bunch of point data of reconstructed image go through the pipeline of OpenGL and finish with coordinates transformation, fragment interpolation, lighting calculation, occlusion test, calculation and superposition of complex amplitude, and finally hologram are generated and loaded into the spatial light modulator (SLM). The experimental result shows that the lifelike complex full-parallax objects can be reconstructed at a high speed with varying gloss and accurate occlusion when viewed from different perspectives in the view-window.

Citation Download Citation

Kai Wu, Jianhong Wu, Lingyan Shi, Mingliang Yao, Yun Chen, and Minjie Hua "A method of calculating full-parallax computer-generated hologram with occlusion and lighting in real time", Proc. SPIE 11188, Holography, Diffractive Optics, and Applications IX, 111881Y (18 November 2019); https://doi.org/10.1117/12.2537603

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