Image processing device and image display device
View Patent ↗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.
1. An image processing device for color conversion, the image processing device comprising:
an input unit to which an image signal expressing an image is input;
a selection unit for selecting an image output mode, the image output mode having at least three different preset display modes that are displayed without regard to the image signal that is input into the input unit;
a memory that stores three-dimensional lookup table (3D-LUT) data, which is determined according to the selected image output mode, the amount of the 3D-LUT data in the memory varies according to the selected image output mode;
an interpolation unit that interpolates the image signal on the basis of the 3D-LUT data stored in the memory; and
an address specifying unit that is configured to divide the image signal into high-order bit data and low-order bit data on a boundary determined according to a color depth,
wherein the memory that stores 3D-LUT data outputs at least three different types of image signals.
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 image signal into the 3D-LUT data by referring to the memory on the basis of a first portion of the image signal, wherein
the interpolation unit interpolates the image signal on the basis of the 3D-LUT data and a parameter which is specified on the basis of a second portion other than the first portion of the image signal.
5. The image processing device according to claim 4 , wherein the first portion of the image signal is high-order bit data of the image signal.
6. The image processing device according to claim 4 , wherein the second portion of the image signal is low-order bit data of the image signal.
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 image signal.
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 an image signal expressing the image to the image display device;
selecting a image output mode of the image display device from a selection unit, the image output mode having at least three different preset display modes;
storing three-dimensional lookup table (3D-LUT) data, which is determined according to the selected image output mode, in a memory included in the image display device;
varying the amount of the 3D-LUT data in the memory according to the selected image output mode;
dividing the image signal into high-order bit data and low-order bit data on a boundary determined according to a color depth;
outputting at least three different types of image signals from the memory included in the image display device;
interpolating the image signal on the basis of the 3D-LUT data stored in the memory; and
displaying the image based on the image signal.