System and method for injection of mapping functions

• US 10,319,137 B2
• Filed: 09/23/2015
• Issued: 06/11/2019
• Est. Priority Date: 06/18/2009
• Status: Active Grant

• Current Assignee: Scalable Display Technologies, Inc.
• Original Assignee: Scalable Display Technologies, Inc.
• Inventors: Amaratunga, Kevin, Timoner, Samson J., Surati, Rajeev J.
• Primary Examiner(s): Craddock, Robert J
• Application Number:
  US14/863,216
• Publication Number:
  US 20160086370A1
• Time in Patent Office: 1,357 Days
• Field of Search: 345419
• CPC Class Codes: G06T 15/005 General purpose rendering architectures
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 9/12 Picture reproducers H04N9/11 takes precedence
• CPC Class Codes: H04N 9/31 Projection devices for colour picture display , e.g. using electronic spatial light modulators [ESLM]
• CPC Class Codes: H04N 9/3138 using arrays of modulated light sources electroluminescent display devices G09G3/30
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026

Abstract

A method and system for improving display quality by injecting a portion of computer code into an existing compositor, using the portion of computer code to apply a mapping function to a first digital image, and forming a second digital image based upon the first digital image as adapted by applying the applied mapping function in the compositor. The second digital image may then be displayed to a viewer via one or more displays where each display forms a part of the displayed digital image. The result may be used for creation of blended or stereoscopic images. The mapping function may be also adapted for modification of geometry or correction of a characteristic (such as color, intensity, etc.) of the display system where such characteristic may be sensed using a detector. The portion of code may be injected into a graphics driver controlling hardware composition for a displayed digital image.

Claims

1. A method of improving display quality comprising:

providing a digital image to a graphics hardware having graphics driver software, the graphics hardware and graphics driver software being free of separate mapping hardware and mapping software;

modifying an API interface associated with the graphics driver software by copying the existing API pointers to the graphics driver software;

replacing at least one of the existing API pointers in the graphics driver software with a replacement set of API pointers, the replacement set of API pointers interrupting and redirecting execution of the graphics driver software to an application-independent mapping function that is distinct from the graphics driver software;

returning to execution of the graphics driver software with the existing API pointers;

dividing the digital image into a plurality of parts; and

transmitting the plurality of image parts to one or more display devices for displaying a displayed image.

2. The method of claim 1, wherein the one or more display devices comprises a plurality of display devices and each display device displays a part of the displayed image.

3. The method of claim 2, wherein the display devices comprise projectors.

4. The method of claim 2, wherein the display devices are arranged so that parts of the displayed image have a partial overlap.

5. The method of claim 1, wherein the mapping function comprises at least one of:

a warping function, a color mapping function, a spatially varying filter, a temporally varying filter, and an intensity mapping function.

6. The method of claim 1, wherein the digital image is formatted for display on a first type of display device and the mapping function modifies the digital image for display on a second type of display device having a different geometry from the first display device.

7. The method of claim 1, wherein the display devices are only approximately aligned and the mapping function accounts for said approximate alignment by stitching together the plurality of parts to form a single displayed image.

8. A system for improving display quality comprising:

graphics hardware having graphics driver software that receives a digital image, the graphics hardware and graphics driver software being free of separate mapping hardware and mapping software;

a mapping process that modifies an API interface associated with the graphics driver software by copying existing API pointers to the graphics driver software, replaces at least one of the existing API pointers in the graphics driver software with a replacement set of API pointers, the replacement set of API pointers interrupting and redirecting execution of the graphics driver software to an application-independent mapping function that is distinct from the graphics driver software, and returns to execution of the graphics driver software with the existing API pointers;

the graphics driver further dividing the digital image into a plurality of parts and transmitting the plurality of image parts to one or more display devices for displaying a displayed image.

9. The system of claim 8, wherein the one or more display devices comprises a plurality of display devices and each display device displays a part of the displayed image.

10. The system of claim 9, wherein the display devices comprise projectors.

11. The system of claim 9, wherein the display devices are arranged so that parts of the displayed image have a partial overlap.

12. The system of claim 8, wherein the mapping function comprises at least one of:

a warping function, a color mapping function, a spatially varying filter, a temporally varying filter, and an intensity mapping function.

13. The system of claim 8, wherein the digital image is formatted for display on a first type of display device and the mapping function modifies the digital image for display on a second type of display device having a different geometry from the first display device.

14. The system of claim 8, wherein the display devices are only approximately aligned and the mapping function accounts for said approximate alignment by stitching together the plurality of parts to form a single displayed image.

15. A method of improving display quality comprising:

executing graphics driver software at a graphics hardware, the graphics driver software having existing API pointers, the graphics hardware and graphics driver software being free of separate mapping hardware and mapping software;

providing a digital image to the graphics driver software;

modifying an API interface associated with the graphics driver software by copying the existing API pointers to the graphics driver software;

replacing at least one of the existing API pointers in the graphics driver software with a replacement set of API pointers, the replacement set of API pointers interrupting and redirecting execution of the graphics driver software to an application-independent mapping function that is distinct from the graphics driver software, the application-independent mapping function comprising a warping function;

modifying the digital image using the application-independent mapping function;

returning to execution of the graphics driver software with the existing API pointers;

dividing the modified digital image into a plurality of parts; and

transmitting the plurality of image parts to one or more display devices for displaying a displayed image.