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Image processing device and image processing method

An image processing device and image processing technology, applied in the directions of image data processing, image data processing, image communication, etc., capable of solving problems such as different color reproduction ranges of video signals

Inactive Publication Date: 2011-12-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in color TV sets, the range of color reproduction of input video signals differs depending on the TV system used.

Method used

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  • Image processing device and image processing method
  • Image processing device and image processing method
  • Image processing device and image processing method

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0112]

[0113] figure 1 It is a block diagram showing the configuration of the display device according to the first embodiment of the present invention. Such as figure 1 As shown, the display device 10 is composed of an image processing device 101 and a liquid crystal panel 109 . The image processing device 101 is used to perform the following functions: according to the primary color chromaticity coordinates of the liquid crystal panel 109, the HDTV standard RGB data RGB sent from the external signal source 20 in (Hereafter also simply referred to as "input data".) Converted into RGB data RGB for supplying to the liquid crystal panel 109 out . The liquid crystal panel 109 applies RGB data based on the RGB data obtained from the image processing device 101 to the liquid crystal layer. out The voltage is used to display images on the display unit (not shown). Here, the chromaticity coordinate values ​​of the primary colors of the liquid crystal panel 109 used in this...

no. 2 approach

[0152]

[0153] Figure 7 It is a block diagram showing the configuration of the display device according to the second embodiment of the present invention. In this embodiment, the image processing device 102 is provided with a white balance processing unit 120 instead of the color gamut conversion processing unit 110 of the above-mentioned first embodiment, and a first white-balanced data weighting processing unit 122 is provided instead of the above-mentioned color gamut conversion processing unit 110 . The first color gamut converted data weighting processing unit 112 of the first embodiment. The configuration other than this is the same as that of the above-mentioned first embodiment, so description thereof will be omitted.

[0154] The white balance processing unit 120 performs an adjustment to the RGB data RGB of the HDTV standard sent from the external signal source 20. in Implement white balance processing. The white balance processing is as shown in the following...

no. 3 approach

[0171]

[0172] Figure 9 It is a block diagram showing the configuration of the display device according to the third embodiment of the present invention. Such as Figure 9 As shown, in the image processing device 103 of this embodiment, it includes: a color gamut conversion processing unit 110; a second data weighting processing unit 114 after color gamut conversion; a white balance processing unit 120; a second data weighting processing unit after white balance 124; data addition unit 130; weight coefficient calculation unit 140; input data weighting processing unit 150; addition data weighting processing unit 160; and output addition unit 190.

[0173] The color gamut conversion processing unit 110 converts the RGB data RGB of the HDTV standard sent from the external signal source 20 based on the above formula (3). in Convert to RGB data RGB for liquid crystal panel 109 panel. The second color gamut converted data weighting processing unit 114 performs the conversion...

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PUM

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Abstract

Provided is an image processing device which enables image display that takes full advantage of a color reproduction performance of a panel without providing a viewer with a feeling of strangeness. An image processing device includes: a color gamut conversion processor configured to convert inputted data into RGB data according to a liquid crystal panel; a weighting factor calculator configured to calculate a weighting factor; a first post-color-gamut-conversion data weighting processor configured to perform weighting processing to the RGB data; an inputted data weighting processor configured to perform weighting processing to the inputted data; and an output adder configured to add data after the weighting processing to generate RGB data to be supplied to the liquid crystal panel. The weighting factor calculator obtains the weighting factor based on a positional relation among a chromaticity coordinate on an xy chromaticity diagram, a color reproduction range for the inputted data, and a boundary line defined so as to include memory colors.

Description

technical field [0001] The present invention relates to an image processing device and an image processing method, and more particularly to a technique for performing a display that fully utilizes the color reproduction range of the device. Background technique [0002] In general, the color reproduction range (also referred to as "color space", "color gamut", "color purity", etc.) of display devices, printing devices, imaging devices, etc. differs depending on the model. In addition, in a color TV set, the color reproduction range of an input video signal differs depending on the TV system used. Therefore, according to the prior art, when generating output data from input data, various color conversion processes are performed so that the color of the input data can be output as faithfully as possible regardless of the difference in the color reproduction range. For example, when HDTV (High Definition Television: High Definition Television) is played on a color TV set using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64G06T1/00G09G3/20G09G5/02H04N1/46H04N1/60H04N9/68H04N9/73
CPCH04N9/67G09G5/02G09G2320/0242G06T11/001G09G3/2003H04N9/643G09G2340/06H04N1/6058
Inventor 张小牤吉田明子
Owner SHARP KK
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