IMAGE WARPING AND LATERAL COLOR CORRECTION

• US 20080158259A1
• Filed: 12/28/2006
• Published: 07/03/2008
• Est. Priority Date: 12/28/2006
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Ramanath, Rajeev, Lieb, David Foster, Skoog, Arnold P., Neal, Henry W., Kempf, Jeffrey Matthew
• Application Number:
  US11/617,171
• Publication Number:
  US 20080158259A1
• Time in Patent Office: Days
• US Class Current: 345/647
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• 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
• 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

Color or grayscale images having optical elements induced geometric distortions can be corrected on individual color image component by creating correction image component having the complementary distortion; and applying the correction image component to the corresponding distorted color image component.

Claims

1. A method for producing an image using an image producing system, comprising:

characterizing a geometric distortion of an image by an optical system;

creating a correction image that has a distortion complementary to the geometric distortion in the corresponding image; and

producing the image using the correction image component.

2. The method of claim 1, wherein the step of producing the image using the correction image component comprises:

producing the image using an array of individually addressable pixels that are reflective and deflectable micromirrors, liquid-crystal cells, liquid-crystal-on-silicon cells, or plasma cells.

3. The method of claim 1, wherein the step of producing the image using the correction image component comprises:

producing the image with a camera.

4. The method of claim 1, further comprising:

performing a Gamut mapping for the image before performing the step of creating a correction image component for each image component of the image.

5. The method of claim 4, further comprising:

deriving a set of bitplane data from the correction image; and

delivering the bitplane data to an array of individually addressable pixels to reproduce the image.

6. The method of claim 5, further comprising:

illuminating the individually addressable pixels that are reflective and deflectable micromirrors;

modulating the light with the bitplane data; and

directing the modulated light onto a screen.

7. The method of claim 1, wherein the image components of the image comprise a groups of different colors that are selected from red, green, blue, yellow, cyan, magenta, or white.

8. The method of claim 10, wherein the correction image component has a color that is selected from red, green, blue, yellow, cyan, magenta, or white.

9. The method of claim 1, wherein the correction image components are created by a warping engine that is a software module comprising a set of computer-executable instructions, or by a warping engine that is an electronic circuit.

10. The method of claim 9, wherein the electronic circuit is a field-programmable-gate-array circuit or an application-specific-integrated-circuit.

11. A computer-readable medium having a set of computer-executable instructions for performing a method for producing an image using an image producing system, wherein the method comprises:

characterizing a geometric distortion introduced to each image component of the image by the image producing system;

creating a correction image component for each image component of the image, wherein said correction image component has a distortion complementary to the geometric distortion in the corresponding image component; and

producing the image using the correction image component.

12. A device for use in an imaging system for correcting a geometric distortion introduced by the imaging system, comprising:

an image warping engine capable of creating a correction image component for each image component of the image, wherein said correction image component has a distortion complementary to a geometric distortion in the corresponding image component introduced by the system during imaging.

13. The device of claim 12, further comprising:

a gamut mapping unit for converting a color space of the image into a color space of the system, wherein the image warping engine is connected to an output of the gamut mapping unit.

14. The device of claim 13, wherein the warping engine is a software module comprising a set of computer-executable instructions or an electronic circuit.

15. The device of claim 13, wherein the warping engine is an electronic circuit that is a field-programmable-gate-array circuit or an application-specific-integrated-circuit.

16. A display system for displaying an image, comprising:

an image engine having an array of individually addressable pixels; and

a control unit comprising a warping engine for creating a correction color image component for each color image component of the image, wherein said correction color image component has a distortion complementary to a geometric distortion in the corresponding color image component introduced by the system during imaging.

17. The system of claim 16, further comprising:

a gamut mapping unit for converting a color space of the image into a color space of the system, wherein the image warping engine is connected to an output of the gamut mapping unit.

18. The system of claim 26, wherein the warping engine is an electronic circuit that is a field-programmable-gate-array circuit or an application-specific-integrated-circuit.

19. A method for displaying an image, comprising:

displaying an image having a second shape from an array of pixels arranged in a first shape, where the array of pixels is an array of light emitting pixels or light modulating pixels;

providing data to the pixels such that the second shape of the displayed image is substantially the same as the first shape of the array of pixels.

20. A method for displaying an image, comprising:

displaying an image having a second shape from an array of pixels arranged in a first shape, where the array of pixels is an array of light emitting pixels or light modulating pixels;

providing data to the pixels such that a subgroup of pixels are turned off such that the second shape of the displayed image is closer to the shape of the entire pixel array than if the data was not provided.

21. A method for displaying an image, comprising:

providing light from an array of pixels arranged in a rectangle;

providing modulation data to a subgroup of the array of pixels such that only the subgroup is modulated with image data, wherein the subgroup are disposed in a geometric shape that is not a rectangle, and wherein the light beam from the subgroup of pixels has a corresponding shape that is not a rectangle;

directing the modulated light through an optical engine so as to change the cross section of the light beam from the subgroup of pixels, such that when the light beam is incident on a target for viewing by a viewer, the shape of the viewed image is substantially rectangular.

22. A method for displaying an image on a target, comprising:

providing a series of light beams of different colors onto a spatial light modulator;

modulating a subgroup of pixels of the spatial light modulator with image data for each color of the series of light beams;

wherein the subgroup of pixels for a first color has a different shape than the subgroup of pixels for a second color.

23. The method of claim 22, wherein the subgroup of pixels for the first and second colors have the same shape and size when displayed on a viewing target.

24. The method of claim 23, wherein the subgroups of pixels for the first and second colors are non-rectangular, and wherein the viewed image formed by a combination of the first and second colors is rectangular due to warping of the light beam during transmission through an optical element within the path of the light beam.