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8 June 2005 Vector quantisation compression of digital holograms of three-dimensional objects
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Digital holograms of real-world three-dimensional objects have been captured using phase-shift digital holography. These holograms have complex-valued pixels and a white noise appearance. Uniform and nonuniform scalar quantisation compression have already been applied to the hologram data with some success. Although each complex-valued pixel can itself be treated as a vector of length two, we extend the analysis using a multidimensional vector quantisation technique based on k-means clustering. This involves an a-by-b blockwise decomposition of the data and mapping it to an ab-dimensional space. Degradation due to lossy compression is measured in the reconstruction domain.
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Alison E. Shortt, Thomas J. Naughton, and Bahram Javidi "Vector quantisation compression of digital holograms of three-dimensional objects", Proc. SPIE 5827, Opto-Ireland 2005: Photonic Engineering, (8 June 2005);

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