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Journal of Electronic Imaging

Fast color processor with programmable interpolation by small memory (PRISM)
Author(s): Katsuhiro Kanamori; Hiroaki Kotera; Osamu Yamada; Hideto Motomura; Rika Iikawa; Teruo Fumoto
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Paper 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.

Paper Details

Date Published: 1 July 1993
PDF: 12 pages
J. Electron. Imaging. 2(3) doi: 10.1117/12.145989
Published in: Journal of Electronic Imaging Volume 2, Issue 3
Show Author Affiliations
Katsuhiro Kanamori, Matsushita Research Institute Tokyo, Inc. (Japan)
Hiroaki Kotera, Matsushita Research Institute Tokyo, Inc. (Japan)
Osamu Yamada, Matsushita Research Institute Tokyo, Inc. (Japan)
Hideto Motomura, Matsushita Research Institute Tokyo, Inc. (Japan)
Rika Iikawa, Matsushita Research Institute Tokyo, Inc. (Japan)
Teruo Fumoto, Matsushita Research Institute Tokyo, Inc. (Japan)


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