System and method for color correction between displays with and without average picture dependency

• US 8,970,636 B2
• Filed: 06/27/2007
• Issued: 03/03/2015
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: Interdigital Vc Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Doser, Ingo Tobias, Lee, Bongsun, Correa, Carlos
• Primary Examiner(s): Caschera, Antonio A
• Application Number:
  US12/452,203
• Publication Number:
  US 20100128057A1
• Time in Patent Office: 2,806 Days
• Field of Search: None
• US Class Current: 345/690
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 5/02 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

Abstract

A system and method for compensating for average brightness dependency (ABD) differences between displays with and without average brightness dependency (ABD) includes color correcting source picture content on a reference display to output color corrected picture content. In addition, an ABD simulation process uses the color corrected picture content to simulate the display of content on the reference display. Subsequently, a compensation process receives the color corrected picture content and information from the simulation process and applies an ABD compensation characteristic to the color corrected picture content for correctly displaying the source picture content on a display with different ABD characteristics than the reference display.

Claims

1. A method for compensating for average brightness dependency (ABD) differences between displays, comprising:

color correcting source picture content on a reference display to produce color corrected picture content; and

applying an ABD compensation characteristic to the color corrected picture content for displaying said source picture content on a display with different ABD characteristics than the reference display;

wherein the color correcting and the applying of the ABD compensation characteristic are performed by at least one processor; and

the applying of the ABD compensation characteristic includes applying an inverse function of an ABD specification.

2. The method of claim 1, further comprising determining ABD settings that are acceptable for a plurality of display types using a single master for the color corrected picture content.

3. The method of claim 1, wherein said source picture content is displayed on a plurality of reference displays and color correction is performed for the plurality of reference displays to determine an ABD specification for simulating a display with different ABD behavior.

4. The method of claim 3, wherein the plurality of reference displays include respective split screens.

5. The method of claim 1, further comprising generating multiple master copies for the color corrected picture content.

6. The method of claim 5, wherein the multiple master copies for the color corrected picture content include one master generated by the color correcting step and one master generated by applying the ABD compensation characteristic.

7. The method of claim 1, wherein ABD compensation characteristics are determined by generating metadata based upon color correction settings, the metadata being transmitted to an ABD simulator for application to said source picture content for correctly displaying said source picture content on a display with different ABD characteristics than the reference display.

8. The method of claim 1, comprising performing a first color correction process for providing color corrected picture content for a display with first ABD characteristics different from said reference display, and performing a second color correction process to provide color corrected picture content for a display with second ABD characteristics different from the reference display.

9. A system for compensating for average brightness dependency (ABD) differences between displays, comprising:

a color correction unit comprising at least one processor configured to color correct source picture content on a reference display to produce color corrected picture content;

a simulation unit comprising at least one processor configured to receive the color corrected picture content and to simulate, on a first display with ABD characteristics different from the reference display, the look of the corrected source picture content on the reference display; and

a compensation unit comprising at least one processor configured to receive the color corrected picture content and information from the simulation unit and to apply an ABD compensation characteristic to the color corrected picture content for displaying said source picture content on a second display with different ABD characteristics than the reference display.

10. The system of claim 9, wherein the simulation unit outputs color corrected picture content to a third display with ABD characteristics that are the same as the reference display.

11. The system of claim 9, wherein the simulation unit outputs color corrected picture content to a third display with ABD characteristics that are different from the reference display.

12. The system of claim 9, further comprising an additional reference display wherein the reference display and the additional reference display are used to determine ABD settings that are acceptable for both the reference display and the additional reference display.

13. The system of claim 12, wherein the reference display and the additional reference display comprise a same display device with a split screen.

14. The system of claim 9, wherein the simulation unit outputs metadata based upon color correction settings, the metadata being transmitted to a simulator for correcting a consumer display device.

15. The system of claim 9, wherein the color correction unit performs an initial color correction process for providing color corrected picture content for a display with first ABD characteristics, and a subsequent color correction process is performed for providing color corrected picture content for a display with second ABD characteristics different from the first ABD characteristics.

16. The system of claim 15, further comprising a color transform unit configured to receive metadata from the simulation unit and color change metadata from the subsequent color correction process to manipulate content for a display with ABD characteristics different from the reference display.

17. The system of claim 16, wherein the color transform unit manipulates an output from the initial color correction process to provide content for display.

18. The system of claim 16, wherein the color transform unit receives as input ABD simulation information from the simulation unit and a color transform specification from the subsequent color correction process.

19. The system of claim 18, wherein ABD simulation information and a color transform specification are stored in look-up tables.

20. A method for compensating for average brightness dependency (ABD) differences between displays, comprising:

color correcting source picture content on a reference display to produce color corrected picture content; and

applying an ABD compensation characteristic to the color corrected picture content for displaying said source picture content on a display with different ABD characteristics than the reference display;

wherein the color correcting and the applying of the ABD compensation characteristic are performed by at least one processor; and

said source picture content is displayed on a plurality of reference displays and color correction is performed for the plurality of reference displays to determine an ABD specification for simulating a display with different ABD behavior.