Method and apparatus for color adjustment

Details Method and apparatus for color adjustment Method and apparatus for color adjustment

1989-10-31

1990-09-25

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, H04N 1387, H04N 140, H04N 146

Patent

active

049597124

ABSTRACT:
A method and an apparatus for color adjustment, in which color adjusting coefficients for respective colors are added to color correction signals in a coefficient matrix, in the matrix masking for the color correction and color adjustment. Further, the sum of the color adjusting coefficients in each row in the coefficient matrix is zero. By this feature a gray level in the original image can be maintained even after the color adjustments. Additionally, the chroma check is made in the color adjustment. This feature prevents the color adjustments from influencing the complementary colors. Only the intended color can be adjusted independently of other colors. Accordingly, the color adjustment is easy and does not require any professional skill.

REFERENCES:
patent: 4789892 (1988-12-01), Tsuzuki
patent: 4819193 (1989-04-01), Imao
patent: 4884130 (1989-11-01), Huntsman

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