Color image generation apparatus and color image generation method
AssigneeToshiba Tec Kabushiki Kaisha
InventorsNoriyuki Kikuchi, Hiroki Umezawa
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Abstract
A process computes a combination of chromatic and achromatic color dots for reproducing an input color signal based on a result of colorimetric measurement for a CIELab value. The process finds the sum of chromatic and achromatic color dot diameters. The process extracts combinations of chromatic and achromatic color dots wherein the sum of chromatic and achromatic color dot diameters is greater than or equal to a specified value. From the extracted combinations of chromatic and achromatic color dots, the process further extracts chromatic and achromatic color signals for recording a combination of chromatic and achromatic color dots containing the minimum achromatic color dot diameter and determines these signals as a color signal.
Claims9
A color image generation apparatus for recording dots by using chromatic and achromatic color materials and expressing gradations by changing respective color dot sizes, comprising:
- image processing means which, when the chromatic and achromatic color dots are each recorded at almost the same position, converts and reproduces an input color signal and processes the input color signal so that the sum of respective dot diameters is greater than a preset specified value.
A color image generation apparatus for recording dots by using chromatic and achromatic color materials and expressing gradations by changing respective color dot sizes, comprising:
- image processing means which, when the chromatic and achromatic color dots are each recorded at almost the same position, converts and reproduces an input color signal and processes the input color signal so that the sum of respective dot diameters is greater than or equal to a preset specified value,
- wherein said image processing means vary a preset specified value according to the number of colors to be recorded.
A color image generating method of converting and reproducing an input color signal and performing processing so that the sum of respective color dot diameters is greater than a preset specified value when chromatic and achromatic color materials are used for recording dots, gradation being expressed by changing color dot sizes, and said chromatic and achromatic color dots are recorded at almost the same position.
Dependencies are inferred from the claim text.