1 July 1993 Fast color processor with programmable interpolation by small memory (PRISM)
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J. of Electronic Imaging, 2(3), (1993). doi:10.1117/12.145989
Abstract
We present a novel color processor with programmable interpolation by small memory (PRISM). The input/output signals to/from the devices are flexibly converted by a 3-D look-up table (LUT) with a PRISM interpolator. The PRISM architecture provides a simple computation algorithm with sufficient accuracy. The performance of PRISM interpolation is compared with other conventional methods. In practice, PRISM is less complicated than CUBE and PYRAMID, and more accurate than PYRAMID and TETRAHEDRON. PRISM cuts the memory size of LUT drastically to an order of 10-4 compared with a full-size LUT method and brings with it a large-scale integration color processor operating at a higher than video rate. The PRISM structure is the most suitable for the perceptual color spaces such as Y-Cr-Cb or CIELAB and very useful for device-independent color reproduction and transmission. Typical applications by a PRISM color processor are presented.
Katsuhiro Kanamori, Hiroaki Kotera, Osamu Yamada, Hideto Motomura, Rika Iikawa, Teruo Fumoto, "Fast color processor with programmable interpolation by small memory (PRISM)," Journal of Electronic Imaging 2(3), (1 July 1993). http://dx.doi.org/10.1117/12.145989
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KEYWORDS
Prisms

RGB color model

Chromium

Printing

Color reproduction

Image processing

Signal processing

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