White point calibration and gamut mapping for a display

Patent metadata

Field	Value
Publication number	US-9934595-B2
Application number	US-201615096871-A
Country	US
Kind code	B2
Filing date	Apr 12, 2016
Priority date	Nov 12, 2015
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

In an example, a method of gamut mapping may include generating a plurality of color values in a first color space based on a plurality of measured color values in a second color space using a color specification that maps color values corresponding to the second color space to color values corresponding to the first color space. The method may include generating a second-order or higher response-surface regression model that maps color values corresponding to the first color space to color values corresponding to the first color space.

First claim

What is claimed is:

1. A method of gamut mapping comprising:
receiving, by one or more processors, a first plurality of color values, wherein the first plurality of color values correspond to a first color space;
receiving, by the one or more processors, a plurality of measured color values corresponding to a plurality of colors displayed by a first target display, wherein the plurality of measured color values correspond to a second color space, and wherein the first plurality of color values are associated with the plurality of measured color values;
generating, by the one or more processors, a second plurality of color values from the plurality of measured color values using a color specification that maps color values corresponding to the second color space to color values corresponding to the first color space, wherein the second plurality of color values correspond to the first color space; and
generating, by the one or more processors based on the first plurality of color values and the second plurality of color values, a second-order or higher response-surface regression model that maps the first plurality of color values corresponding to the first color space to the second plurality of color values corresponding to the first color space.

2. The method of claim 1 , wherein the color specification includes a color standard.

3. The method of claim 2 , wherein the color standard is sRGB.

4. The method of claim 1 , wherein at least one calibration tool includes the one or more processors.

5. The method of claim 4 , further comprising:
storing the second-order or higher response-surface regression model in a memory of the at least one calibration tool or in a memory accessible to the one or more processors of the at least one calibration tool.

6. The method of claim 1 , further comprising:
storing, for gamut mapping during operation of the first target display, the second-order or higher response-surface regression model in a memory of the first target display, a memory accessible by the first target display, or a memory of a device including the first target display.

7. The method of claim 6 , further comprising:
gamut mapping the first target display using the second-order or higher response-surface regression model stored in the memory of the first target display, the memory accessible by the first target display, or the memory of a device including the first target display.

8. The method of claim 1 , further comprising:
storing, for gamut mapping during operation of a second target display, the second-order or higher response-surface regression model in a memory of the second target display, a memory accessible by the second target display, or a memory of a device including the second target display, wherein the second target display has at least one of a part number, model number, batch number, or identification number in common with the first target display.

9. The method of claim 8 , further comprising:
gamut mapping the second target display using the second-order or higher response-surface regression model stored in the memory of the second target display, the memory accessible by the second display, or the memory of a device including the second target display.

10. The method of claim 1 , further comprising:
receiving the plurality of measured color values from a colorimeter.

11. The method of claim 1 , further comprising:
outputting, by the one or more processors, the one or more colors for display by the first target display.

12. The method of claim 1 , further comprising:
receiving, by the one or more processors, the plurality of measured color values from a memory accessible by the one or more processors.

13. The method of claim 1 , wherein the second-order or higher response-surface regression model includes second or third order terms.

14. A device comprising:
a memory; and
one or more processors configured to:
receive a first plurality of color values, wherein the first plurality of color values correspond to a first color space;
receive a plurality of measured color values corresponding to a plurality of colors displayed by a first target display, wherein the plurality of measured color values correspond to a second color space, and wherein the first plurality of color values are associated with the plurality of measured color values;
generate a second plurality of color values from the plurality of measured color values using a color specification that maps color values corresponding to the second color space to color values corresponding to the first color space, wherein the second plurality of color values correspond to the first color space;
store the second plurality of color values in the memory; and
generate, based on the first plurality of color values and the second plurality of color values, a second-order or higher response-surface regression model that maps the first plurality of color values corresponding to the first color space to the second plurality of color values corresponding to the first color space.

15. The device of claim 14 , wherein the color specification includes a color standard.

16. The device of claim 15 , wherein the color standard is sRGB.

17. The device of claim 14 , wherein the one or more processors are further configured to:
store the second-order or higher response-surface regression model in the memory;
store the second-order or higher response-surface regression model in a memory of the first target display, a memory accessible by the first target display, or a memory of an apparatus including the first target display; or
store the second-order or higher response-surface regression model in a memory of a second target display, a memory accessible by the second target display, or a memory of an apparatus including the second target display, wherein the second target display has at least one of a part number, model number, batch number, or identification number in common with the first target display.

18. The device of claim 14 , wherein the one or more processors are further configured to:
receive the plurality of measured color values from a colorimeter.

19. The device of claim 14 , wherein the one or more processors are further configured to:
output the one or more colors for display by the first target display.

20. The device of claim 14 , wherein the one or more processors are further configured to:
receive the plurality of measured color values from the memory.

21. The device of claim 14 , wherein the second-order or higher response-surface regression model includes second or third order terms.

22. A apparatus comprising:
means for receiving a first plurality of color values, wherein the first plurality of color values correspond to a first color space;
means for receiving a plurality of measured color values corresponding to a plurality of colors displayed by a first target display, wherein the plurality of measured color values correspond to a second color space, and wherein the first plurality of color values are associated with the plurality of measured color values;
means for generating a second plurality of color values from the plurality of measured color values using a color specification that maps color values corresponding to the second color space to color values corresponding to the first color space, wherein the second plurality of color values correspond to the first color space; and
means for generating, based on the first plurality of color values and the

Assignees

• Qualcomm Inc

Inventors

• Safaee-Rad Reza
• Gille Jennifer Lee

Classifications

• G06T11/10 Primary

  Texturing; Colouring; Generation of textures or colours (retouching, inpainting or scratch removal G06T5/77) · CPC title

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H04N1/6008

  with primary colour signals, e.g. RGB or CMY(K) · CPC title

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title