Apparatus and method for controlling hue and luminance in image display device
AssigneeSamsung Electronics Co., Ltd.
InventorsHyun-wook Ok, Seong-deok Lee, Chang-yeong Kim
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Abstract
An apparatus for converting input image signals into image signals that can be displayed in an image display device. The image display device includes a color space converter converting color components of the input image signals and color components that can be displayed in the image display device into color space, a hue control variable calculator comparing a converted color gamut with each other to calculate a hue control variable, and a hue controller controlling hues of the input image signals using the hue control variable.
Claims13
A method for converting input image signals into image signals that can be displayed in an image display device, the method comprising:
- converting color components of the input image signals and color components that can be displayed in the image display device into color space, respectively;
- comparing a converted color gamut with each other to calculate a hue control variable;
- and
- controlling hues of the input image signals using the hue control variable,
- wherein the comparing operation includes:
- obtaining hue and luminance corresponding to the maximum chromaticity of the input image signals and hue and luminance corresponding to the maximum chromaticity of the image signals that can be displayed in the image display device, from the converted color gamut;
- and
- calculating the hue control variable using the obtained hue and luminance, and
- wherein the hue control variable is a distance of the hue of the input image signal to coincide hue of the color coordinates having the maximum luminance of the input image signals with hue of the color coordinates having the maximum luminance of the image signals that can be displayed in the image display device.
An apparatus for converting input image signals into image signals that can be displayed in an image display device, the apparatus comprising:
- a color space converter to convert color components of the input image signals and color components that can be displayed in the image display device into color space, respectively;
- a hue control variable calculator to compare the converted color gamut with each other to calculate a hue control variable;
- and
- a hue controller to control hues of the input image signals using the hue control variable,
- wherein the hue control variable calculator obtains hue and luminance corresponding to the maximum chromaticity of the input image signals and hue and luminance corresponding to the maximum chromaticity of the image signals that can be displayed in the image display device, from the converted color gamut, and calculates the hue control variable using the obtained hue and luminance, and
- wherein the hue control variable is a distance of the hue of the input image signal to coincide hue of the color coordinates having the maximum luminance of the input image signals with hue of the color coordinates having the maximum luminance of the image signals that can be displayed in the image display device.
A method for converting input image signals into image signals to output to an output device, the method comprising:
- converting color components of the input signals into color space of the output device;
- comparing a converted color gamut with each other to calculate a hue control variable;
- and
- controlling hues of the input image signals using the hue control variable;
- wherein the comparing operation includes:
- matching a hue and luminance corresponding to the maximum chromaticity of the input image signals and hue and luminance corresponding to the maximum chromaticity of image signals of the output device;
- and
- calculating the hue control variable using the matched hue and luminance, and
- wherein the hue control variable is a distance of the hue of the input image signal to coincide hue of the color coordinates having the maximum luminance of the input image signals with hue of the color coordinates having the maximum luminance of the image signals that can be displayed in the image display device.
Dependencies are inferred from the claim text.