The judgment of color in the colorant industrys have used the visualcolor matching generally.
The practical technique that is low-cost, simple and speedy, have not been found.
The spectrophotometry is most accurate of the various measurements of color.
Therefore, it was tried to study as follow.
1) The spectral energy differences are looked for both colors to compare.
2) The differences are integrated by CIE tristimulus calculation.
3) If both colors are equal, the answer must be zero. Moreover, the factor of Color differences are looked for this method approximately, and the testing time may be shortened by which the number of times of the measurements are reduced. Now, thismethod igtestibg on our factory.
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