Title:
色空間変換装置および色空間変換方法
Document Type and Number:
Japanese Patent JP3991606
Kind Code:
B2
Abstract:
When an sRGB color space and an wRGB color space have a common white point in a device-independent color space, the CPU 31 of a color printer 20 eliminates deviation of the white points of the two color spaces occurring when a color value of the sRGB color space has been converted to a color value of the wRGB color space using a matrix operation L, by correcting the coefficients of matrix L. As a result of correction a matrix L' is obtained. CPU 31 executes gamma correction on the RGB color space color value obtained by a matrix operation S, and then executes matrix operation L'. CPU 31 executes inverse gamma correction on the color value obtained by a matrix operation L'.
Inventors:
Kenji Fukasawa
Application Number:
JP2001074519A
Publication Date:
October 17, 2007
Filing Date:
March 15, 2001
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G06T1/00; H04N1/60; H04N1/46
Domestic Patent References:
| JP11355585A | ||||
| JP11341294A | ||||
| JP11127340A |
Attorney, Agent or Firm:
Takao Igarashi
Takashi Shimoide
Hiroshi Ichikawa
Mitsuhiro Kato
Takashi Shimoide
Hiroshi Ichikawa
Mitsuhiro Kato