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Study on Optimization of Look-Up Table to Reduce Error of Three-dimensional Interpolation  

Kim, Joo-Young (Samsung SDI)
Lee, Hak-Sung (Dept. of Electronic Engineering, Sejong University)
Han, Dong-Il (Dept. of Computer Engineering, Sejong University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.44, no.2, 2007 , pp. 12-18 More about this Journal
Abstract
The three dimensional interpolation is widely used for many kinds of color signal transformation such as real-time color gamut mapping. Given input color signal, the output color signal is approximately calculated by the interpolation with the input point and extracted values from a lookup table which is constructed by storing the values of transformation at regularly packed sample points. Apparently, errors of the interpolated approximation heavily depend on the selection of the lookup table. In this paper, a least square method is applied to assigning values of the lookup table with fixed size in order to minimize error of three-dimensional interpolation. The experimental result shows that the proposed method has better interpolation performance.
Keywords
three-dimensional interpolation; look-up table; least square method;
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