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Fast method of calculating a photorealistic hologram based on orthographic ray-wavefront conversion

机译:基于正交射线波前转换计算逼真的全息图的快速方法

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A computer-generated hologram based on ray-wavefront conversion can reconstruct photorealistic three-dimensional (3D) images containing deep virtual objects and complicated physical phenomena; however, the required computational cost has been a problem that needs to be solved. In this Letter, we introduce the concept of an orthographic projection in the ray-wavefront conversion technique for reducing the computational cost without degrading the image quality. In the proposed method, plane waves with angular spectra of the object are obtained via orthographic ray sampling and Fourier transformation, and only the plane waves incident on the hologram plane are numerically propagated. We verified this accelerated computational method theoretically and experimentally, and demonstrated optical reconstruction of a deep 3D image in which the effects of occlusions, transmission, refraction, and reflection were faithfully reproduced. (C) 2016 Optical Society of America
机译:基于射线波前转换的计算机生成全息图可以重建包含深层虚拟物体和复杂物理现象的逼真的三维(3D)图像;但是,所需的计算成本一直是需要解决的问题。在这封信中,我们介绍了射线波前转换技术中的正交投影概念,以减少计算成本而不降低图像质量。在所提出的方法中,通过正交射线采样和傅立叶变换获得具有物体的角谱的平面波,并且仅数值入射在全息图平面上的平面波被传播。我们在理论上和实验上验证了这种加速的计算方法,并演示了深层3D图像的光学重建,其中忠实地再现了遮挡,透射,折射和反射的影响。 (C)2016美国眼镜学会

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