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Conference Publication

Accelerating phase-added stereogram calculations by coefficient grouping for digital holography

Host Publication: SPIE Photonics Europe, 2020

Authors: D. Blinder and P. Schelkens

Publisher: SPIE

Publication Date: Apr. 2020

Number of Pages: 10


Abstract:

Computer generated holography (CGH) is a computationally intensive task, which requires the design of efficient algorithms for calculating realistic holograms in real-time. Sparse CGH algorithms address this challenge by computing holographic signals in a transform domain where they are sparse, thereby requiring only to update a small number of coefficients and speeding up calculations. However, the required memory access patterns form a bottleneck, limiting speed gains. We propose a novel technique for computing phase-added stereograms by grouping Fourier coefficients into sub-stereograms, mapping to contiguous cells in 3D space. We present various implementations of this algorithm, reporting speedup factors ranging from 3 to 30 depending on the devices’ computing capability, without compromising on quality. This enables real-time CGH for driving holographic displays for more complex scenes.

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Dr. David Blinder

+32 (0)02 629 169

dblinder@etrovub.be

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Prof. Dr. Ir. Peter Schelkens

+32 (0)02 629 168

pschelke@etrovub.be

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