Patent Number: 6,637,861

Title: Reduction of dependence of color appearance on light source

Abstract: A look up table LUT with specific gray reproduction characteristics is usedfor converting RGB image data to multi-tone data of ink colors. The grayreproduction characteristics of LUT are set such that the color difference.DELTA.E of a gray color area with an arbitrary tone level in the L*a*b*color system is kept at about 4 or less, assuming that the results areobserved under two different light sources, such as standard light D50 andstandard light A, respectively.

Inventors: Yamamoto; Yuko (Nagano-ken, JP)


International Classification: H04N 1/52 (20060101); H04N 1/60 (20060101); B41J 002/205 (); G06F 015/00 ()

Expiration Date: 10/22015