Viewpoint Compensation for Curved Display Surfaces in Projector-Based Display Systems

• US 20100321408A1
• Filed: 06/19/2009
• Published: 12/23/2010
• Est. Priority Date: 06/19/2009
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Nelson, Steve, Ivashin, Victor, Miceli, Sean
• Application Number:
  US12/488,355
• Publication Number:
  US 20100321408A1
• Time in Patent Office: Days
• US Class Current: 345/643
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP

Abstract

Methods having corresponding apparatus and tangible computer-readable media comprise: generating a second image based on a first image and a viewpoint transform, wherein the viewpoint transform represents a mapping between pixel locations of the first image and coordinates of a model of a curved display surface; and generating a third image based on the second image and a projection transform, wherein the projection transform represents a mapping between the coordinates of the model of the curved display surface and pixel locations of a projector; wherein the third image is projected upon the curved display surface by the projector.

Claims

1. Tangible computer-readable media embodying instructions executable by a computer to perform a method comprising:

generating a second image based on a first image and a viewpoint transform, wherein the viewpoint transform represents a mapping between pixel locations of the first image and coordinates of a model of a curved display surface; and

generating a third image based on the second image and a projection transform, wherein the projection transform represents a mapping between the coordinates of the model of the curved display surface and pixel locations of a projector;

wherein the third image is projected upon the curved display surface by the projector.

2. The tangible computer-readable media of claim 1, wherein the method further comprises:

generating the viewpoint transform.

3. The tangible computer-readable media of claim 2, wherein generating the viewpoint transform comprises:

generating the model of the curved display surface.

4. The tangible computer-readable media of claim 1, wherein generating the second image comprises:

rendering the second image based on the first image by modifying vertices of the first image according to the viewpoint transform.

5. The tangible computer-readable media of claim 1, wherein generating the third image comprises:

rendering the third image based on the second image by modifying fragments of the second image according to the projection transform.

6. An apparatus comprising:

a viewpoint module adapted to generate a second image based on a first image and a viewpoint transform, wherein the viewpoint transform represents a mapping between pixel locations of the first image and coordinates of a model of a curved display surface; and

a projection module adapted to generate a third image based on the second image and a projection transform, wherein the projection transform represents a mapping between the coordinates of the model of the curved display surface and pixel locations of a projector;

wherein the third image is projected upon the curved display surface by the projector.

7. The apparatus of claim 6, further comprising:

a viewpoint transform module adapted to generate the viewpoint transform.

8. The apparatus of claim 7, wherein the viewpoint transform module comprises:

a model module adapted to generate the model of the curved display surface.

9. The apparatus of claim 6, wherein the viewpoint module comprises:

a render module adapted to render the second image based on the first image.

10. The apparatus of claim 9, wherein the render module comprises:

a vertex shader adapted to modify vertices of the first image according to the viewpoint transform.

11. The apparatus of claim 6, wherein the projection module comprises:

a render module adapted to render the third image based on the second image.

12. The apparatus of claim 11, wherein the render module comprises:

a fragment shader adapted to modify fragments of the second image according to the projection transform.

13. A method comprising:

generating a second image based on a first image and a viewpoint transform, wherein the viewpoint transform represents a mapping between pixel locations of the first image and coordinates of a model of a curved display surface; and

generating a third image based on the second image and a projection transform, wherein the projection transform represents a mapping between the coordinates of the model of the curved display surface and pixel locations of a projector;

wherein the third image is projected upon the curved display surface by the projector.

14. The method of claim 13, further comprising:

generating the viewpoint transform.

15. The method of claim 14, wherein generating the viewpoint transform comprises:

generating the model of the curved display surface.

16. The method of claim 13, wherein generating the second image comprises:

rendering the second image based on the first image by modifying vertices of the first image according to the viewpoint transform.

17. The method of claim 13, wherein generating the third image comprises:

rendering the third image based on the second image by modifying fragments of the second image according to the projection transform.