Color processing device, color processing system, and non-transitory computer readable medium

Patent metadata

Field	Value
Publication number	US-2016286188-A1
Application number	US-201514839284-A
Country	US
Kind code	A1
Filing date	Aug 28, 2015
Priority date	Mar 24, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

A color processing device includes the following elements. An image data obtaining unit obtains image data which is obtained by imaging a white member illuminated by a light source and a display device on which a white image is displayed. A color component extracting unit extracts color components of red, green, and blue from image data concerning the white member and image data concerning the white image. A relation determining unit determines a relation between a color temperature and/or a brightness level of the light source and a color temperature and/or a brightness level of the white image, on the basis of a magnitude relation of the extracted color components.

First claim

What is claimed is:

1 . A color processing device comprising:
an image data obtaining unit that obtains image data which is obtained by imaging a white member illuminated by a light source and a display device on which a white image is displayed; a color component extracting unit that extracts color components of red, green, and blue from image data concerning the white member and image data concerning the white image; and a relation determining unit that determines a relation between a color temperature and/or a brightness level of the light source and a color temperature and/or a brightness level of the white image, on the basis of a magnitude relation of the extracted color components.

2 . The color processing device according to claim 1 , wherein the relation determining unit determines a magnitude relation between the color temperature of the light source and the color temperature of the white image displayed on the display device, on the basis of a magnitude relation of a ratio between the color components of blue and the color components of red.

3 . The color processing device according to claim 2 , wherein:
the color temperature of one of the light source and the white image is changed, and the image data obtaining unit obtains a plurality of items of image data, each of the plurality of items of image data being obtained by imaging the white member and the display device on which the white image is displayed; and the relation determining unit determines an upper limit and a lower limit of the color temperature of the other one of the light source and the white image.

4 . The color processing device according to claim 1 , wherein the relation determining unit determines a magnitude relation between the brightness level of the light source and the brightness level of the white image displayed on the display device, on the basis of a magnitude relation of the color components of green.

5 . The color processing device according to claim 2 , wherein the relation determining unit determines a magnitude relation between the brightness level of the light source and the brightness level of the white image displayed on the display device, on the basis of a magnitude relation of the color components of green.

6 . The color processing device according to claim 3 , wherein the relation determining unit determines a magnitude relation between the brightness level of the light source and the brightness level of the white image displayed on the display device, on the basis of a magnitude relation of the color components of green.

7 . A color processing system comprising:
a white member; a display device that displays an image; an imaging device that images the white member illuminated by a light source and the display device on which a white image is displayed; and a color processing device that determines a relation between a color temperature and/or a brightness level of the light source and a color temperature and/or a brightness level of the white image, on the basis of image data obtained by imaging the white member and the display device by using the imaging device, the color processing device including
an image data obtaining unit that obtains the image data,
a color component extracting unit that extracts color components of red, green, and blue from image data concerning the white member and image data concerning the white image, and
a relation determining unit that determines a relation between the color temperature and/or the brightness level of the light source and the color temperature and/or the brightness level of the white image, on the basis of a magnitude relation of the extracted color components.

8 . The color processing system according to claim 7 , wherein alignment information for placing the display device on the white member and focusing information for focusing the white member by using the imaging device are indicated on the white member.

9 . A non-transitory computer readable medium storing a program causing a computer to execute a process, the process comprising:
obtaining image data which is obtained by imaging a white member illuminated by a light source and a display device on which a white image is displayed; extracting color components of red, green, and blue from image data concerning the white member and image data concerning the white image; and determining a relation between a color temperature and/or a brightness level of the light source and a color temperature and/or a brightness level of the white image, on the basis of a magnitude relation of the extracted color components.

Assignees

• Fuji Xerox Co Ltd

Inventors

• Osawa Chizuru
• Iwafuchi Toshihiro
• Sakai Noriko

Classifications

• H04N23/88 Primary

  for colour balance, e.g. white-balance circuits or colour temperature control · CPC title

• H04N9/735 Primary

  Electricity · mapped topic

• G01J3/506 Primary

  measuring the colour produced by screens, monitors, displays or CRTs · CPC title

• G01J5/60

  using determination of colour temperature · CPC title

• G09G5/02

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title