IMAGE PROCESSING DEVICE AND IMAGE DISPLAY DEVICE

• US 20110234620A1
• Filed: 06/08/2011
• Published: 09/29/2011
• Est. Priority Date: 02/23/2007
• Status: Active Grant

• Current Assignee: Columbia Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KOYAMA, Fumio
• Granted Patent: US 8,325,397 B2
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• 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 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/06 using colour palettes, e.g. look-up tables
• CPC Class Codes: H04N 1/6016 Conversion to subtractive colour signals
• 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 9/643 Hue control means, e.g. flesh tone control

Abstract

An image processing device for converting a color tone of an image includes: an input unit to which an image is input; a designation unit that designates precision of color conversion performed on the input image; a color conversion table that stores output color data after color conversion of color data, which is determined according to the designated precision and may be included in the image, in an address space determined according to the precision; an address specifying unit that specifies an address referring to the color conversion table on the basis of a first portion, which is determined according to the precision, of color data expressing the input image; a color converting unit that converts the color data included in the input image into output color data by referring to the specified address of the color conversion table; a parameter specifying unit that specifies a parameter for interpolating a color, which is expressed by the output color data, on the basis of a second portion other than the first portion of the color data included in the input image; and an interpolation unit that interpolates a color, which is expressed by the converted output color data, on the basis of the specified parameter.

Claims

1. An image processing device for color conversion, the image processing device comprising:

an input unit to which first color data expressing an image is input;

a selection unit for selecting an image output mode;

a memory that stores second color data, which is determined according to the selected image output mode; and

an interpolation unit that interpolates third color data on the basis of the second color data stored in the memory.

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

a precision of color conversion differs according to the selected image output mode.

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

the output mode includes at least one of a first mode suitable for movie, a second mode suitable for television program, and a third mode suitable for presentation.

4. The image processing device according to claim 1, further comprising:

a color converting unit that converts the first color data into the second color data by referring to the memory on the basis of a first portion of the first color data, wherein

the interpolation unit interpolates the third color data on the basis of the second color data and a parameter which is specified on the basis of a second portion other than the first portion of the first color data.

5. The image processing device according to claim 4,

wherein the first portion of the first color data is high-order bit data of the first color data.

6. The image processing device according to claim 4,

wherein the second portion of the first color data is low-order bit data of the first color data.

7. An image display device comprising:

the image processing device according to claim 1; and

a display unit that displays the image based on the third color data.

8. The image display device according to claim 7 configured as a projector.

9. A method for displaying an image by an image display device, the method comprising:

inputting first color data expressing the image to the image display device;

selecting a image output mode of the image display device;

storing second color data, which is determined according to the selected image output mode, in a memory included in the image display device;

interpolating a third color data on the basis of the second color data stored in the memory; and

displaying the image based on the third color data.