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Accelerated computer generated holography using sparse bases in the STFT domain This publication appears in: Optics Express Authors: D. Blinder and P. Schelkens Volume: 26 Issue: 2 Pages: 1461-1473 Publication Date: Jan. 2018
Abstract: Computer-generated holography at high resolutions is a computationally intensive task. Efficient algorithms are needed to generate holograms at acceptable speeds, especially for real-time and interactive applications such as holographic displays. We propose a novel technique to generate holograms using a sparse basis representation in the short-time Fourier space combined with a wavefront-recording plane placed in the middle of the 3D object. By computing the point spread functions in the transform domain, we update only a small subset of the precomputed largest-magnitude coefficients to significantly accelerate the algorithm over conventional look-up table methods. We implement the algorithm on a GPU, and report a speedup factor of over 30. We show that this transform is superior over wavelet-based approaches, and show quantitative and qualitative improvements over the state-of-the-art WASABI method we report accuracy gains of 2dB PSNR, as well improved view preservation.
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