Image forming apparatus having a saturation correction unit

Details Image forming apparatus having a saturation correction unit Image forming apparatus having a saturation correction unit

1997-03-20

1999-10-12

Grant, II, Jerome

Facsimile and static presentation processing

Natural color facsimile

Color correction

358530, 358518, 382162, 382167, H04N 146

Patent

active

059662220

ABSTRACT:
The individual pattern of each color of the standard pattern is printed on a copy being made, and when the copy is read by a scanner, the image data of the standard pattern are converted into color region signals in a uniform color space by an HVC converter and a C.multidot.H operation unit. In the case where the saturation of the image data has become lower than the standard saturation of the color region, saturation corrective coefficients are determined by a saturation corrective coefficient calculation unit. After the saturation coefficients have been determined for each color of the standard pattern, the image data of the original are read out, and the saturation corrective coefficients for the color region of the image data are used for saturation correction by a saturation correction processing unit. The image data which have been subjected to the saturation correction are reversely converted into the image data of each color by a reverse HVC converter. According to the reversely converted image data, an image is formed on a copying paper.

REFERENCES:
patent: 5204948 (1993-04-01), Kato
patent: 5345320 (1994-09-01), Hirota
patent: 5371609 (1994-12-01), Suzuki et al.
patent: 5398124 (1995-03-01), Hirota
patent: 5563726 (1996-10-01), Suzuki et al.

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