Image display system, projector, image processing method, and information recording medium

• US 20040021672A1
• Filed: 02/25/2003
• Published: 02/05/2004
• Est. Priority Date: 06/26/2001
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Wada, Osamu
• Application Number:
  US10/362,543
• Publication Number:
  US 20040021672A1
• Time in Patent Office: Days
• US Class Current: 345/591
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: H04N 1/6088 by viewing conditions, i.e. conditions at picture output
• CPC Class Codes: H04N 17/045 Self-contained testing apparatus
• CPC Class Codes: H04N 9/3182 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 Class Codes: H04N 9/3194 including sensor feedback
• CPC Class Codes: H04N 9/64 Circuits for processing colour signals H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84
• CPC Class Codes: H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control camera processing pipelines for colour balance H04N23/88

Abstract

To provide an environment-compliant image display system, a projector, an image processing method and an information storage medium, which can more accurately reproduce a color appearance of an image adaptable to a target color, a target profile correcting section (166) for correcting target profiles in a target profile storing section (162) based on environmental information from a color light sensor (60); a color gamut computing section (160) for computing a displayable color gamut based on the target profile, the environmental information and the projector profiles in the projector profile storing section (164); a matrix generating section (122) for generating a transforming matrix according to the relationship between a target color gamut and the displayable color gamut, and a matrix transforming section (124) for transforming the image information using the generated transforming matrix are provided to transform image information and to display the image.

Claims

1. An image display system that displays an image by transforming image information used to display the image so as to reproduce a target color, based on environmental information from a viewing environment grasp means for grasping a viewing environment in a display region of the image;

the image display system comprising;

target color information correcting means for correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

matrix generating means for generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information;

matrix transforming means for transforming the image information, based on the generated transforming matrix; and

image display means for displaying the image, based on the transformed image information.

2. The image display system as defined in claim 1,

wherein the adaptive color shift information is determined based on the ratio between a color gamut area capable of being displayed by the image display means under a darkroom condition and a color gamut area capable of being displayed by the image display means in the viewing environment.

3. The image display system as defined in claim 2, further comprising:

a color gamut computing means for computing a displayable color gamut which is a color gamut capable of being displayed by the image display means in the viewing environment, based on the environmental information and the corrected target color information,

wherein the matrix generating means generates the transforming matrix which differs among the cases where the displayable color gamut is wider than a target color gamut indicating the color gamut of the target color, where the displayable color gamut is narrower than the target color gamut, where the displayable color gamut is equal to the target color gamut, and where the displayable color gamut includes both overlapping and non-overlapping portions with the target color area.

4. The image display system as defined in claim 3,

wherein the matrix generating means generates the transforming matrix valuing the reproducibility of hue or color gamut when the displayable color gamut is narrower than the target color gamut and when the displayable color gamut includes both overlapping and non-overlapping portions with the target color gamut.

5. An image display system that displays an image by transforming image information used to display the image so as to reproduce a target color, based on environmental information from a viewing environment grasp section grasping a viewing environment in a display region of the image;

the image display system comprising;

target color information correcting section correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

matrix generating section generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information;

matrix transforming section transforming the image information, based on the generated transforming matrix; and

image display section displaying the image, based on the transformed image information.

6. A projector that projects an image by transforming image information used to display the image so as to reproduce a target color, based on environmental information from a viewing environment grasp means for grasping a viewing environment in a display region of the image, the projector comprising:

target color information correcting means for correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

matrix generating means for generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information;

matrix transforming means for transforming the image information, based on the generated transforming matrix; and

image display means for displaying the image, based on the transformed image information.

7. A projector that projects an image by transforming image information used to display the image so as to reproduce a target color, based on environmental information from a viewing environment grasp section grasping a viewing environment in a display region of the image, the projector comprising:

target color information correcting section correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

matrix generating section generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information;

matrix transforming section transforming the image information, based on the generated transforming matrix; and

image display section displaying the image, based on the transformed image information.

8. An image processing method of transforming image information used to display an image so as to reproduce a target color, based on environmental information from a viewing environment grasp means for grasping a viewing environment in a display region of the image, the method comprising the steps of:

correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information, and

transforming the image information, based on the generated transforming matrix.

9. The image processing method as defined in claim 8,

wherein the adaptive color shift information is determined based on the ratio between a color gamut area capable of being displayed by the image display means under a darkroom condition and a color gamut area capable of being displayed by means for displaying the image in the viewing environment.

10. The image processing method as defined in claim 9,

wherein when the transforming matrix is generated, a target color gamut which is a color gamut based on the image characteristics is computed, and at the same time, the displayable color gamut which is a color gamut displayable by means for displaying the image in the viewing environment is computed based on the environmental information, and

wherein the transforming matrix, which differs among the cases where the displayable color gamut is wider than the target color gamut indicating the color gamut of the target color, where the displayable color gamut is narrower than the target color gamut, where the displayable color gamut is equal to the target color gamut, and where the displayable color gamut includes both overlapping and non-overlapping portions with the target color area, is generated.

11. The image processing method as defined in claim 10,

wherein when the transforming matrix is generated, the transforming matrix valuing the reproducibility of hue or color gamut is generated in the cases where the displayable color gamut is narrower than the target color gamut and where the displayable color gamut includes both overlapping and non-overlapping portions with the target color gamut.

12. The image processing method as defined in claim 11, comprising the steps of:

generating a calibration image prior to correcting the image information;

displaying the generated calibration image on the display region; and

grasping the viewing environment in the display region on which the calibration image is displayed and generating the environmental information.

13. A computer-readable information storage medium storing a program for transforming image information used to display an image so as to reproduce a target color, based on environmental information from a viewing environment grasp means for grasping a viewing environment in a display region of the image, the program causing a computer to function as:

target color information correcting means for correcting target color information indicating the target color, based on the environmental information and adaptive color shift information indicating an adaptive color shift;

matrix generating means for generating a transforming matrix so as to display the image adaptable to the viewing environment and the target color, based on the corrected target color information; and

matrix transforming means for transforming the image information, based on the generated transforming matrix.

14. The information storage medium as defined in claim 13,

wherein the adaptive color shift information is determined based on the ratio between a color gamut area capable of being displayed by image display means for displaying the image based on the image information under a darkroom condition and a color gamut area capable of being displayed by the image display means in the viewing environment.

15. The information storage medium as defined in claim 14, causing the computer to function as color gamut computing means for computing a displayable color gamut which is a color gamut capable of being displayed by the image display means in the viewing environment, based on the environmental information and the corrected target color information,

wherein the matrix generating means generates the transforming matrix which differs among the cases where the displayable color gamut is wider than a target color gamut indicating the color gamut of the target color, where the displayable color gamut is narrower than the target color gamut, where the displayable color gamut is equal to the target color gamut, and where the displayable color gamut includes both overlapping and non-overlapping portions with the target color area.

16. The information storage medium as defined in claim 15,

wherein the matrix generating means generates the transforming matrix valuing the reproducibility of hue or color gamut in the cases where the displayable color gamut is narrower than the target color gamut and where the displayable color gamut includes both overlapping and non-overlapping portions with the target color gamut.