System and method for displaying an image

• US 20070132965A1
• Filed: 12/12/2005
• Published: 06/14/2007
• Est. Priority Date: 12/12/2005
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Allen, William, Damera-Venkata, Niranjan, Widdowson, Simon, An Chang, Nelson
• Application Number:
  US11/301,060
• Publication Number:
  US 20070132965A1
• Time in Patent Office: Days
• US Class Current: 353/94
• CPC Class Codes: G03B 37/04 with cameras or projectors providing touching or overlapping fields of view
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026
• CPC Class Codes: H04N 9/317 Convergence or focusing systems electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53

Abstract

A method of displaying an image with a display system includes receiving image data for the image. A plurality of sub-frames corresponding to the image data are generated based on a geometric relationship between a reference coordinate system and a plurality of projectors. The plurality of sub-frames are projected onto a target surface with the plurality of projectors, thereby producing a resulting image on the target surface. The resulting image includes small pixels overlapping with large pixels over a substantial portion of the resulting image.

Claims

1. A method of displaying an image with a display system, the method comprising:

receiving image data for the image;

generating a plurality of sub-frames corresponding to the image data based on a geometric relationship between a reference coordinate system and a plurality of projectors;

projecting the plurality of sub-frames onto a target surface with the plurality of projectors, thereby producing a resulting image on the target surface; and

wherein the resulting image includes small pixels overlapping with large pixels over a substantial portion of the resulting image.

2. The method of claim 1, wherein first and second ones of the projectors each include an imaging array with pixels of varying sizes.

3. The method of claim 2, wherein the first and the second projectors are configured to project sub-frames such that small pixels produced by the first projector substantially overlap large pixels produced by the second projector, and large pixels produced by the first projector substantially overlap small pixels produced by the second projector.

4. The method of claim 1, wherein first and second ones of the projectors each include optics to distort projected sub-frames and thereby produce pixels of varying sizes in the projected sub-frames.

5. The method of claim 4, wherein the first and the second projectors are configured to project sub-frames such that small pixels produced by the first projector substantially overlap large pixels produced by the second projector, and large pixels produced by the first projector substantially overlap small pixels produced by the second projector.

6. The method of claim 1, wherein a first and a second one of the projected sub-frames are tiled sub-frames, and a third one of the projected sub-frames substantially overlaps both the first and the second projected sub-frames on the target surface.

7. The method of claim 6, wherein a fourth one of the projected sub-frames substantially overlaps the first, the second, and the third projected sub-frames.

8. The method of claim 6, wherein the third projected sub-frame is substantially larger than the first and the second projected sub-frames, and wherein the third projected sub-frame has substantially larger pixels than pixels of the first and the second projected sub-frames.

9. The method of claim 1, and further comprising:

determining minimum and maximum achievable luminance levels at a plurality of points on the target surface.

10. The method of claim 9, and further comprising:

mapping luminance values of the image data to target luminance values that are within the minimum and maximum achievable luminance levels, thereby generating a target luminance profile.

11. The method of claim 10, wherein the plurality of sub-frames are generated based on a difference between a simulated image and the target luminance profile.

12. The method of claim 11, wherein the simulated image is defined as a summation of up-sampled, filtered, and geometrically transformed sub-frames.

13. A system for displaying an image, the system comprising:

a plurality of projection devices;

a buffer adapted to receive image data for the image;

a sub-frame generator configured to define a plurality of sub-frames corresponding to the image data based on a geometric relationship between a reference coordinate system and the plurality of projection devices; and

wherein the plurality of projection devices are adapted to project the plurality of sub-frames onto a target surface, thereby producing a resulting image on the target surface, the resulting image including high resolution pixels overlapping with low resolution pixels over a substantial portion of the resulting image.

14. A method of displaying an image with a display system, the method comprising:

receiving image data for the image;

transforming the image data from a first color space to a second color space;

mapping the transformed image data to target values in the second color space, thereby generating a target profile;

generating a plurality of sub-frames in the second color space based on the target profile;

transforming the plurality of sub-frames from the second color space to the first color space; and

projecting the transformed sub-frames onto a target surface with a plurality of projectors, thereby producing a resulting image on the target surface.

15. The method of claim 14, and further comprising:

determining minimum and maximum achievable luminance values and chrominance values at a plurality of points on the target surface; and

wherein the target values include target luminance values that are within the minimum and maximum achievable luminance values, and wherein the target values include target chrominance values that are within the minimum and maximum achievable chrominance values.

16. The method of claim 14, wherein the first color space is RGB, and the second color space is CIE XYZ.

17. The method of claim 16, and further comprising:

determining minimum and maximum achievable X, Y, and Z values in the CIE XYZ color space at a plurality of points on the target surface.

18. The method of claim 17, wherein the target values are X, Y, and Z values in the CIE XYZ color space that fall within the minimum and maximum achievable X, Y, and Z values, respectively.

19. The method of claim 14, wherein the plurality of sub-frames are generated based on a difference between a simulated image and the target profile.

20. The method of claim 19, wherein the simulated image is defined as a summation of up-sampled, filtered, and geometrically transformed sub-frames.