Device, system and method for photometric compensation of images provided by a display device

Patent metadata

Field	Value
Publication number	US-10630948-B2
Application number	US-201816142781-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Sep 26, 2018
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A device, system and method for photometric compensation of images provided by a display device. A display device is controlled to provide colors, the display device configured to provide images according to the colors of the display device. A camera acquires respective images of the colors provided by the display device. A per-pixel correction function for modifying image data used by the display device to provide the images is determined based on: the respective images of each of the colors acquired by the camera corrected into the HVS model using a predetermined color-relationship between the camera and a Human Visual System (HVS) model for the colors of the display device. The display device is controlled to provide the images using the image data as corrected using the per-pixel correction function.

First claim

What is claimed is:

1. A device comprising:
a controller in communication with:
a projector configured to project colors and project images according to the colors of the projector; and
a camera arranged to detect one or more of the images and the colors projected by the projector, the camera and the projector having a common field of view; and
a memory storing: a predetermined color-relationship between the camera and a human visual system (HVS) model for the colors of the projector,

the controller configured to:
control the projector to project the colors;
control the camera to acquire respective images of the colors projected by the projector;
determine a per-pixel correction function for modifying image data used by the projector to project the images, based on:
the respective images of each of the colors acquired by the camera corrected into the HVS model using the predetermined color-relationship between the camera and the HVS model for the colors of the projector;

control the projector to project the images using the image data as corrected using the per-pixel correction function; and
apply one or more of a look-up table (LUT) and a mathematical function to linearize the images when controlling the projector to project the images using the image data as corrected using the per-pixel correction function.

2. The device of claim 1 , wherein the projector is configured to project onto a non-white surface located in the common field of view.

3. The device of claim 1 , wherein the projector is set to a target white point prior to projecting the colors in a determination of the per-pixel correction function.

4. The device of claim 1 , wherein the controller is further configured to: control the projector to project the colors in association with using structured light to determine a geometry-relationship between the projector and camera.

5. The device of claim 1 , wherein the projector comprises a 1-chip projector.

6. The device of claim 1 , wherein the colors comprise one or more of: primary colors; and red, green and blue.

7. The device of claim 1 , wherein the per-pixel correction function includes an ambient light correction factor.

8. The device of claim 1 , wherein the HVS model comprises a 1931 CIE (International Commission on Illumination) color space model.

9. A method comprising:
controlling, using a controller, a projector to project colors, the projector configured to project images according to the colors of the projector;
controlling, using the controller, a camera to acquire respective images of the colors projected by the projector, the camera and the projector having a common field of view;
determining, using the controller, a per-pixel correction function for modifying image data used by the projector to project the images, based on:
the respective images of each of the colors acquired by the camera corrected into a Human Visual System (HVS) model using a predetermined color-relationship between the camera and (the HVS model for the colors of the projector, the controller in communication with a memory storing the predetermined color-relationship;

controlling, using the controller, the projector to provide the images using the image data as corrected using the per-pixel correction function; and
applying one or more of a look-up table (LUT) and a mathematical function to linearize the images when controlling the projector to project the images using the image data as corrected using the per-pixel correction function.

10. The method of claim 9 , wherein the projector is configured to project onto a non-white surface located in the common field of view.

11. The method of claim 9 , wherein the projector is set to a target white point prior to projecting the colors in a determination of the per-pixel correction function.

12. The method of claim 9 , further comprising: controlling, using the controller, the projector to project the colors in association with using structured light to determine a geometry-relationship between the projector and camera.

13. The method of claim 9 , wherein the projector comprises a 1-chip projector.

14. The method of claim 9 , wherein the colors comprise one or more of: primary colors; and red, green and blue.

15. The method of claim 9 , wherein the per-pixel correction function includes an ambient light correction factor.

16. The method of claim 9 , wherein the HVS model comprises a 1931 CIE (International Commission on Illumination) color space model.

17. A device comprising:
a controller in communication with:
a light emitting diode (LED) display configured to provide images according to colors of the LED display; and
a camera arranged to detect one or more of the images and the colors provided by the LED display; and
a memory storing: a predetermined color-relationship between the camera and a human visual system (HVS) model for the colors of the LED display,

the controller configured to:
control the LED display to provide the colors;
control the camera to acquire respective images of the colors provided by the LED display;
determine a per-pixel correction function for modifying image data used by the LED display to provide the images, based on:
the respective images of each of the colors acquired by the camera corrected into the HVS model using the predetermined color-relationship between the camera and the HVS model for the colors of the LED display;
control the LED display to provide the images using the image data as corrected using the per-pixel correction function; and
apply one or more of a look-up table (LUT) and a mathematical function to linearize the images when controlling the LED display to provide the images using the image data as corrected using the per-pixel correction function.

Assignees

• Christie Digital Systems Usa

Inventors

• Post Matthew
• Lamm Mark

Classifications

• H04N9/3182 Primary

  Colour adjustment, e.g. white balance, shading or gamut (white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607) · CPC title

• G09G2340/06

  Colour space transformation · CPC title

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• H04N9/3194

  including sensor feedback · CPC title