Color image processing method and apparatus with chrominance emp

Details Color image processing method and apparatus with chrominance emp Color image processing method and apparatus with chrominance emp

1993-01-21

1995-02-14

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358520, 348661, H04N 146, G03F 308

Patent

active

053900340

ABSTRACT:
Color image processing method and apparatus for suppressing side effects of a chrominance emphasizing process are provided. A chrominance C of an original color image is detected by a chrominance detector. A luminousness V of the original color image is detected by a luminousness detector. A parameter selector selects chrominance conversion parameters on the basis of the chrominance C and luminousness V to generate a selected parameter. A chrominance converter executes the chrominance conversion by chrominance conversion parameters a to i. It is possible to suppress a side effect such that the color deviation becomes conspicuous in a portion of small chrominance and luminousness due to the execution of the chrominance emphasizing process. Thus, image data of a high quality can be obtained.

REFERENCES:
patent: 4733295 (1988-03-01), Hemsky et al.

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