Method for producing a color image and imaging device employing same

• US 8,767,006 B2
• Filed: 08/02/2013
• Issued: 07/01/2014
• Est. Priority Date: 09/01/2009
• Status: Expired due to Fees

• Current Assignee: Entertainment Experience LLC
• Original Assignee: Entertainment Experience LLC
• Inventors: Sullivan, James R., Heckaman, Rodney L.
• Primary Examiner(s): Caschera, Antonio A
• Application Number:
  US13/957,907
• Publication Number:
  US 20130314435A1
• Time in Patent Office: 333 Days
• Field of Search: None
• US Class Current: 345/601
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 2360/144 the light being ambient light
• 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
• CPC Class Codes: G09G 5/06 using colour palettes, e.g. look-up tables

Abstract

A method of producing a color image comprising providing input image data from an image source such as a camera; generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image color data to output image color data in an image rendering unit; loading the at least three-dimensional look-up table into an image color rendering controller; loading the input image data into the imaging color rendering controller; processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table; and outputting the output color values to the image rendering unit to produce an output image that is perceived to have at least one of enhanced brightness, enhanced contrast, or enhanced colorfulness compared to the input image.

Claims

1. A method of producing a color image by an OLED display, the method comprising:

a. providing input image data to be rendered as an image by the OLED display comprised of OLED pixels, the input image data containing memory colors and non-memory colors;

b. identifying the memory colors in the input image data to be substantially maintained;

c. characterizing the memory colors and non-memory colors with respect to their chromaticities;

d. generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image data to output image color data of the OLED display in a manner that optimally manages the quality of the image and the lifetime of the OLEDs of the pixels;

e. loading the at least three-dimensional look-up table into an image color rendering controller;

f. loading the input image data into the imaging color rendering controller;

g. processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table; and

h. outputting the output image color data to produce the image by the OLED display, wherein the memory colors identified in the input image data are substantially maintained, as perceived by a human observer, in the image.

2. The method of claim 1, wherein the OLEDs of the pixels are comprised of at least three OLEDs including a red OLED, a green OLED, and a blue OLED.

3. The method of claim 2, wherein managing the quality of the image and the lifetime of the OLEDs comprises adding a white primary and mapping predetermined amounts of the grey component of RGB pixel values to the white primary to reduce the usage of RGB and extend the life of the red, green, and blue OLEDS.

4. The method of claim 2, wherein the at least three OLEDs are a red OLED, a green OLED, and a blue OLED, and wherein managing the quality of the image and the lifetime of the OLEDs comprises adding other primary colors and mapping predetermined amounts of the RGB pixel values to the other primary colors to reduce the usage of RGB and extend the life of the red, green, and blue OLEDS.

5. The method of claim 2, further comprising operating the at least three OLEDs of the pixels such that a first of the OLEDs does not reach end of life sooner than the other OLEDs, and the image quality of each of the OLEDs is reduced about equally over time without perceived artifacts or appearances predominantly of one of the OLED colors.

6. The method of claim 1, further comprising having a controlled degradation of image quality due to changes in the outputs of at least one of the OLEDs of the pixels, wherein the change of quality at any given point in time has the least loss in perceived quality.

7. The method of claim 6, further comprising tracking the controlled degradation by accumulating and using usage data for all of the OLEDs.

8. The method of claim 7, further comprising performing the controlled degradation on the entire image over time.

9. The method of claim 7, further comprising performing the controlled degradation on at least one portion of the image over time.

10. The method of claim 6, further comprising performing the controlled degradation by substantially maintaining the brightness of the image as perceived by a human observer while gradually reducing color saturation of the image over time.

11. The method of claim 6, further comprising a decreased color saturation in the mapping of the input to output colors to reduce usage of the shortest lifetime OLED color to increase the overall lifetime of the OLED display.

12. The method of claim 6, further comprising performing the controlled degradation by substantially maintaining the brightness of the image as perceived by a human observer while reducing color saturation of the image to a greater extent in image pixels of low color saturation than in image pixels of high color saturation.

13. The method of claim 6, further comprising performing the controlled degradation by substantially maintaining the brightness of the image as perceived by a human observer while reducing color saturation gradually using adaptive one dimensional tables on each of the primary colors.

14. The method of claim 13, wherein where the one dimensional tables on each primary color are calculated using a quality degradation model.

15. The method of claim 1, wherein the values in the look-up table are calculated based upon a model of human visual system perceptual adaptation.

16. The method of claim 1, wherein enhanced brightness, enhanced contrast, or enhanced colorfulness introduced by the at least three dimensional look-up-table produce a chosen artistic perception in the output image.

17. The method of claim 1, wherein the OLED display is of an expanded color gamut greater than the color gamut of the input image data, and wherein the output colors to the OLED display utilize the expanded color gamut.

18. The method of claim 1, wherein the OLED display is of a reduced color gamut smaller than the color gamut of the input image data, and wherein the output colors to the OLED display utilize the reduced color gamut.

19. The method of claim 1, wherein perceived colorfulness, brightness, and contrast of the non-memory colors are changed differently than perceived colorfulness, brightness, and contrast of the memory colors.

20. The method of claim 1, wherein perceived colorfulness, brightness, and contrast of the non-memory colors are increased more than perceived colorfulness, brightness, and contrast of the memory colors.

21. The method of claim 1, wherein generating the at least three-dimensional look-up table includes computing enhanced lightness, chroma, and hue for the memory colors using a non-linear enhancement function.

22. The method of claim 1, further comprising generating more than one at least three-dimensional look-up table for the color transformation of the non-memory colors and the memory colors.

23. The method of claim 1, further comprising generating more than one at least three-dimensional look-up table for the color transformation of the non-memory colors and the memory colors, wherein each of the at least three dimensional look-up tables is optimized for a different viewing environment of the OLED display.

24. The method of claim 23, further comprising selecting one of the at least three-dimensional look-up tables for loading into the image color rendering controller based upon the viewing environment of the OLED display.

25. The method of claim 24, further comprising providing a sensor for measuring the ambient light in the viewing environment.

26. The method of claim 1, wherein the input image data is of a first color standard, and the method further comprises converting the input image data of the first input color standard into an input color specification for inputting into the three-dimensional look-up table.

27. The method of claim 1, wherein the at least three-dimensional look-up table has at least three input colors.

28. The method of claim 1, wherein the at least three-dimensional look-up table has at least three output colors.

29. The method of claim 28, wherein the at least three output colors are any combination of primary colors as independent light sources or secondary colors defined as combinations of primary colors.

30. The method of claim 1, wherein the at least three dimensional look-up table is losslessly compressed to reduce storage use in a memory of the image color rendering controller.

31. The method of claim 1, further comprising calibrating the OLED display by measuring the color response of the OLED display, and then modifying the output image data by one of additional processing after the at least three-dimensional look-up-table or including the required calibration in the at least three-dimensional look-up-table.

32. The method of claim 1, wherein the image color rendering controller is contained within the OLED display.

33. The method of claim 1, wherein the imaging color rendering controller is external to the OLED display.

34. The method of claim 1, wherein an auxiliary imaging device controller is in communication with the image color rendering controller and the OLED display.

35. The method of claim 1, wherein the image color rendering controller is in communication with at least one of a cable TV set-top box, a video game console, a personal computer, a computer graphics card, a DVD player, a Blu-ray player, a broadcast station, an antenna, a satellite, a broadcast receiver and processor, and a digital cinema.

36. The method of claim 1, wherein the OLED display includes an algorithm for color modification, wherein the at least three-dimensional look-up table further comprises processing the input image data to compensate for the color modification performed by the OLED display.

37. The method of claim 36, wherein the OLED display includes an algorithm for creating secondary colors from primary colors, and the at least three-dimensional look-up table further comprises compensating for the color modification performed by the addition of the secondary colors in the OLED display.

38. The method of claim 36, wherein the at least three-dimensional look-up table further comprises processing the input image data to increase perceived color, brightness, and contrast to compensate for the reduction in perceived color, brightness, and contrast caused by the algorithm for color modification in the OLED display.

39. The method of claim 1, wherein the at least three-dimensional look-up table contains a transformation from a suboptimal viewing environment to an improved viewing environment including the visual adaptation of the human visual system.

40. The method of claim 1, wherein the at least three-dimensional look-up table includes the definition of secondary colors, and contains enhanced lightness, chroma, and hues to increase perceived colorfulness, contrast, or brightness to compensate for the loss in perceived colorfulness, contrast, or brightness due to addition of the secondary colors by the OLED display.

41. The method of claim 1, wherein the color image is a 3D color image comprised of two 2D stereo images provided simultaneously.

42. A method of producing a color image by an OLED display, the method comprising:

a. providing input image data to be rendered as an image by the OLED display comprised of OLED pixels;

b. generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image data to output image color data of the OLED display in a manner that optimally manages the quality of the image and the lifetime of the OLEDs of the pixels;

c. loading the at least three-dimensional look-up table into an image color rendering controller;

d. loading the input image data into the imaging color rendering controller;

e. processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table;

f. causing a controlled degradation of image quality due to changes in the outputs of at least one of the OLEDs of the pixels, wherein the change of quality at any given point in time has the least loss in perceived quality; and

g. outputting the output image color data to produce the image by the OLED display.

wherein the at least three dimensional lookup table converts the input image data to output image color data of the OLED display in a manner that includes the use of visual color adaptation mapping of input to output colors to the OLED display white point value, thereby using less of the shortest lifetime OLED color and increasing the overall lifetime of the OLED display.

43. A method of producing a color image by an OLED display, the method comprising:

a. providing input image data to be rendered as an image by the OLED display comprised of OLED pixels, each OLED pixel capable of light output;

b. generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image data to output image color data of the OLED display in a manner that optimally manages the quality of the image and the lifetime of the OLEDs of the pixels;

c. loading the at least three-dimensional look-up table into an image color rendering controller;

d. loading the input image data into the imaging color rendering controller;

e. processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table;

f. causing a controlled degradation of image quality due to changes in the outputs of at least one of the OLEDs of the pixels, wherein the change of quality at any given point in time has the least loss in perceived quality; and

g. outputting the output image color data to produce the image by the OLED display;

wherein the at least three dimensional lookup table converts the input image data to output image color data of the OLED display in a manner that causes a decreased white point luminance and increased color saturation of the longer lifetime OLED colors, thereby reducing usage of the shortest lifetime OLED color and increasing overall lifetime of the OLED display.

44. A method of producing a color image by an OLED display, the method comprising:

a. providing input image data to be rendered as an image by the OLED display comprised of OLED pixels;

b. generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image data to output image color data of the OLED display in a manner that optimally manages the quality of the image and the lifetime of the OLEDs of the pixels;

c. loading the at least three-dimensional look-up table into an image color rendering controller;

d. loading the input image data into the imaging color rendering controller;

e. processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table;

f. causing a controlled degradation of image quality due to changes in the outputs of at least one of the OLEDs of the pixels, wherein the change of quality at any given point in time has the least loss in perceived quality, wherein the controlled degradation is performed by substantially maintaining the brightness of the image as perceived by a human observer while reducing color saturation gradually using adaptive one dimensional tables on each of the primary colors, the one dimensional tables on each primary color being calculated using a quality degradation model that averages among one dimensional tables that are pre-designed to provide the targeted image quality at specific OLED lifetimes; and

g. outputting the output image color data to produce the image by the OLED display.

45. The method of claim 44, wherein the one dimensional tables are produced by interpolation between a one dimensional table for when the OLEDs are initially operated and a one dimensional table for when the OLEDs are at the ends of their useful lifetimes.

46. A method of producing a color image by an OLED display, the method comprising:

a. providing input image data to be rendered as an image by the OLED display comprised of OLED pixels;

b. generating an at least three-dimensional look-up table of values of input colors and output colors, wherein the values in the lookup table convert the input image data to output image color data of the OLED display in a manner that optimally manages the quality of the image and the lifetime of the OLEDs of the pixels and wherein the at least three-dimensional look-up table processes the input image data to include chromatic adaptation of the human visual system to a specified white point that increases the brightness of the OLED display;

c. loading the at least three-dimensional look-up table into an image color rendering controller;

d. loading the input image data into the imaging color rendering controller;

e. processing the input image data through the at least three-dimensional look-up table to produce output color values stored at the addresses in the at least three-dimensional look-up table; and

f. outputting the output image color data to produce the image by the OLED display.