# US 2017/0257531 A1 · Color processing device, image forming system, color processing method, and non-transitory computer readable medium

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- Number: US 2017/0257531 A1
- Document ID: US20170257531A1
- Status: Published application
- Kind: A1
- Application number: 15/255,216
- Filed: 2016-09-02
- Published: 2017-09-07
- Earliest claimed: 2016-03-04
- Assignees: Fuji Xerox Co., Ltd.
- Applicants: Fuji Xerox Co., Ltd.
- Inventors: Jungo HARIGAI; Ryosuke HIGASHIKATA; Yoshitaka KUWADA
- Web page: https://patentgrep.com/patent/US20170257531A1

## CPC

- H04N 1/6025: {using look-up tables}
- H04N 1/6008: {with primary colour signals, e.g. RGB or CMY(K)}
- H04N 1/603: {controlled by characteristics of the picture signal generator or the picture reproducer}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A color processing device includes a compositing unit, a modification unit, and an output unit. The compositing unit composites plural color conversion rules in a color space that includes plural color components through serial processing. The modification unit modifies the color conversion rules after being composited by the compositing unit, by applying an inverse conversion of a specific one-dimensional correlation, which correlates input color values and output color values in the color space, to the composited color conversion rules. The output unit outputs the composited color conversion rules after being modified and the specific one-dimensional correlation.

## Claims

### Claim 1

A color processing device comprising:
a compositing unit that composites a plurality of color conversion rules in a color space that includes a plurality of color components through serial processing;
a modification unit that modifies the color conversion rules after being composited by the compositing unit, by applying an inverse conversion of a specific one-dimensional correlation, which correlates input color values and output color values in the color space, to the composited color conversion rules; and
an output unit that outputs the composited color conversion rules after being modified and the specific one-dimensional correlation.

### Claim 2 (depends on 1)

The color processing device according to claim 1,
wherein the output unit outputs the modified composited color conversion rules and the specific one-dimensional correlation in place of the plurality of color conversion rules.

### Claim 3 (depends on 1)

The color processing device according to claim 1,
wherein the plurality of color conversion rules include a plurality of multi-dimensional color conversion rules for performing a color conversion on each of the plurality of color components, and
the specific one-dimensional correlation is used in a color conversion process positioned between color conversion processes performed using the plurality of multi-dimensional color conversion rules.

### Claim 4 (depends on 3)

The color processing device according to claim 3,
wherein the specific one-dimensional correlation is present for each of the plurality of color components.

### Claim 5 (depends on 1)

The color processing device according to claim 1,
wherein the specific one-dimensional correlation has been prepared by correlating input color values that indicate tones in a specific color region and output color values output when the input color values are input to the plurality of color conversion rules.

### Claim 6

An image forming system comprising:
a compositing unit that composites a plurality of color conversion rules in a color space that includes a plurality of color components through serial processing;
a modification unit that modifies the color conversion rules after being composited by the compositing unit, by applying an inverse conversion of a specific one-dimensional correlation, which correlates input color values and output color values in the color space, to the composited color conversion rules; and
an image forming unit that forms an image on a recording material using the composited color conversion rules after being modified and the specific one-dimensional correlation.

### Claim 7

A color processing method comprising:
compositing a plurality of color conversion rules in a color space that includes a plurality of color components through serial processing;
modifying the color conversion rules after being composited, by applying an inverse conversion of a specific one-dimensional correlation, which correlates input color values and output color values in the color space, to the composited color conversion rules; and
outputting the composited color conversion rules after being modified and the specific one-dimensional correlation.

### Claim 8

A non-transitory computer readable medium storing a program causing a computer to execute color processing comprising:
compositing a plurality of color conversion rules in a color space that includes a plurality of color components through serial processing;
modifying the color conversion rules after being composited, by applying an inverse conversion of a specific one-dimensional correlation, which correlates input color values and output color values in the color space, to the composited color conversion rules; and
outputting the composited color conversion rules after being modified and the specific one-dimensional correlation.