Image processing device, projection display device, and image processing method

• US 8,789,952 B2
• Filed: 06/08/2011
• Issued: 07/29/2014
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kanai, Masashi, Kinoshita, Satoshi, Okamoto, Junichi
• Primary Examiner(s): CHOWDHURY, SULTAN U.
• Application Number:
  US13/155,739
• Publication Number:
  US 20110316896A1
• Time in Patent Office: 1,147 Days
• Field of Search: 353/30, 353/31, 353/69, 353/70, 353/85, 353/121, 353/122, 348743-747, 348/E17.005, 348/E5.102, 348/E5.12, 348/E9.025, 348/E9.027, 348/E9.037, 348/E9.054, 345589-594, 349/5, 349 7- 9
• US Class Current: 353/85
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• 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
• 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

Abstract

An image processing device generates image data of a projection image displayed on a screen having a color obtained by correcting a color of original data representing an image to be displayed so that the projection image has a desired color. The image processing device includes a storage section adapted to store a spectral reflectivity of the screen, a designation section adapted to designate a type of an outside light in an installation environment of the screen, a correction light determination section adapted to determine a correction light using a spectral distribution of the reflected light obtained based on the spectral reflectivity and a spectral distribution of the outside light, and a color correction section adapted to generate the image data using the original data and data of a spectral distribution of the correction light.

Claims

1. An image processing device adapted to generate image data of a projection image, which is displayed on a projection target surface using a projection display device, having a color obtained by correcting a color of original data representing an image to be displayed so that the projection image has a desired color, the image processing device comprising:

a storage section adapted to store a spectral reflectivity of the projection target surface;

a designation section adapted to designate a type of an outside light in an installation environment of the projection target surface;

a correction light determination section adapted to determine a correction light, a reflected light of which on the projection target surface corresponds to a light having a spectral distribution presenting an achromatic color by overlapping a reflected light of the outside light on the projection target surface, using a spectral distribution of the reflected light of the outside light obtained based on the spectral reflectivity and an exclusive measurement of a spectral distribution of the outside light; and

a correction section adapted to generate the image data using the original data and data of a spectral distribution of the correction light,

wherein

the correction light determination section includes

a light intensity measuring section provided in the projection display device, and adapted to measure a light intensity of the reflected light of the outside light entering the projection target surface, and a light intensity of the reflected light of the correction light entering the projection target surface, and

a light intensity determination section adapted to determine a light intensity of the correction light so that the achromatic color is presented by overlapping the reflected light of the outside light and the reflected light of the correction light each other based on the light intensity of the reflected light of the outside light, and the light intensity of the reflected light of the correction light.

2. The image processing device according to claim 1, wherein

the correction light determination section includes

a light intensity measuring section disposed on the projection target surface, and adapted to measure a light intensity of the outside light entering the projection target surface, and a light intensity of the correction light entering the projection target surface, and

a light intensity determination section adapted to determine a light intensity of the correction light so that the achromatic color is presented by overlapping the reflected light of the outside light and the reflected light of the correction light each other based on a light intensity of the reflected light of the outside light obtained based on the light intensity of the outside light, the spectral reflectivity, and the spectral distribution of the outside light, and a light intensity of the reflected light of the correction light obtained based on the light intensity of the correction light, the spectral reflectivity, and the spectral distribution of the correction light.

3. The image processing device according to claim 1, wherein

the correction light determination section includes

a sample image forming section adapted to generate sample image data of a plurality of sample images formed using respective candidate correction lights made different from each other in light intensity,

a selection section adapted to allow a user to select a specific sample image out of the plurality of sample images, and

a light intensity determination section adapted to determine the light intensity of the candidate correction light forming the specific sample image as a light intensity of the correction light.

4. The image processing device according to claim 1, wherein

the storage section stores a characteristic value inherent in the outside light for identifying the outside light with respect to a plurality of types of light assumed as the outside light, and

the designation section includes

a characteristic value measuring section adapted to measure the characteristic value, and

an estimation section adapted to estimate the type of the outside light using a measurement result of the characteristic value measuring section and with reference to the characteristic value stored in the storage section.

5. The image processing device according to claim 1, wherein

the storage section stores spectral distributions of a plurality of types of light assumed as the outside light, and

the designation section includes an input section adapted to allow a user to select and input the type of the outside light in the installation environment of the projection target surface out of the plurality of types of light.

6. A projection display device comprising:

the image processing device according to claim 1;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.

7. A projection display device comprising:

the image processing device according to claim 2;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.

8. A projection display device comprising:

the image processing device according to claim 3;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.

9. A projection display device comprising:

the image processing device according to claim 4;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.

10. A projection display device comprising:

the image processing device according to claim 5;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.

11. An image processing method adapted to generate image data of a projection image, which is displayed on a projection target surface using a projection display device, having a color obtained by correcting a color of original data representing an image to be displayed so that the projection image has a desired color, the image processing method comprising:

obtaining a spectral distribution of a reflected light of an outside light in an installation environment of the projection target surface on the projection target surface based on a spectral reflectivity of the projection target surface and an exclusive measurement of a spectral distribution of the outside light;

calculating a correction light, a reflected light of which on the projection target surface corresponds to a light having a spectral distribution presenting an achromatic color by overlapping a reflected light of the outside light on the projection target surface; and

generating the image data obtained by adding data of the correction light to the original data,

wherein

calculating the correction light includes measuring a light intensity provided in the projection display device, measuring a light intensity of the reflected light of the outside light entering the projection target surface, and measuring a light intensity of the reflected light of the correction light entering the projection target surface, and

determining a light intensity of the correction light so that the achromatic color is presented by overlapping the reflected light of the outside light and the reflected light of the correction light based on the light intensity of the reflected light of the outside light, and the light intensity of the reflected light of the correction light.

12. An image processing device adapted to generate image data of a projection image, which is displayed on a projection target surface using a projection display device, having a color obtained by correcting a color of original data representing an image to be displayed so that the projection image has a desired color, the image processing device comprising:

a storage section adapted to store a spectral reflectivity of the projection target surface;

a designation section adapted to designate a type of an outside light in an installation environment of the projection target surface;

a correction light determination section adapted to determine a correction light, a reflected light of which on the projection target surface corresponds to a light having a spectral distribution presenting an achromatic color by overlapping a reflected light of the outside light on the projection target surface, using a spectral distribution of the reflected light of the outside light obtained based on the spectral reflectivity and an exclusive measurement of a spectral distribution of the outside light; and

a correction section adapted to generate the image data using the original data and data of a spectral distribution of the correction light, wherein

the storage section stores a characteristic value inherent in the outside light for identifying the outside light with respect to a plurality of types of light assumed as the outside light, and

the designation section includes

a characteristic value measuring section adapted to measure the characteristic value, and

an estimation section adapted to estimate the type of the outside light using a measurement result of the characteristic value measuring section and with reference to the characteristic value stored in the storage section.

13. The image processing device according to claim 12, wherein

the correction light determination section includes

a light intensity measuring section disposed on the projection target surface, and adapted to measure a light intensity of the outside light entering the projection target surface, and a light intensity of the correction light entering the projection target surface, and

a light intensity determination section adapted to determine a light intensity of the correction light so that the achromatic color is presented by overlapping the reflected light of the outside light and the reflected light of the correction light each other based on a light intensity of the reflected light of the outside light obtained based on the light intensity of the outside light, the spectral reflectivity, and the spectral distribution of the outside light, and a light intensity of the reflected light of the correction light obtained based on the light intensity of the correction light, the spectral reflectivity, and the spectral distribution of the correction light.

14. The image processing device according to claim 12, wherein

the correction light determination section includes

a sample image forming section adapted to generate sample image data of a plurality of sample images formed using respective candidate correction lights made different from each other in light intensity,

a selection section adapted to allow a user to select a specific sample image out of the plurality of sample images, and

a light intensity determination section adapted to determine the light intensity of the candidate correction light forming the specific sample image as a light intensity of the correction light.

15. The image processing device according to claim 12, wherein

the storage section stores spectral distributions of a plurality of types of light assumed as the outside light, and

the designation section includes an input section adapted to allow a user to select and input the type of the outside light in the installation environment of the projection target surface out of the plurality of types of light.

16. A projection display device comprising:

the image processing device according to claim 12;

an image forming section to which the image data generated by the image processing device is input, and adapted to form the projection image based on the image data; and

a projection optical system adapted to display the projection image formed by the image forming section by projection.