Image repetition quality improving method of large-color-gamut display device
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A display device, a technology with a large color gamut, applied in the field of color science and imaging, and can solve problems such as poor quality of reproduced images
Active Publication Date: 2016-08-17
XIDIAN UNIV
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[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a method for improving the image reproduction quality of a large color gamut display device. By modulating the color appearance space and establishing a reverse characterization model, the modulated The conversion between the CIE tristimulus value and the digital driving value, so as to take into account the realism of the memory color and the gorgeous visual effect of the non-memory color, and obtain the color information presentation in the large color gamut display device that meets people's preferences, and is used to solve the existing large The technical problem of poor reproduced image quality in the image reproduction of color gamut display equipment
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Embodiment 1
[0043] refer to figure 1 , taking a desktop monitor EIZO CG241W with an 8-bit graphics card as an example, the image reproduction quality improvement includes the following steps:
[0044] Step 1, for any digital image transmitted to EIZO CG241W to be presented, extract the digital driving value of each pixel, and the digital driving value of the i-th pixel is recorded as (R i ,G i ,B i );
[0045] Step 2, the calculation method stipulated by the sRGB standard, as shown in formulas (11) to (14), the digital driving value of each pixel obtained in step 1 (R i ,G i ,B i ) to its corresponding CIE tristimulus value (X i ,Y i ,Z i ), where (T R , T G , T B ) is the intermediate calculation value;
[0046] T R = R i / ( 12.92 ...
Embodiment 2
[0087] The method of embodiment 2 is the same as embodiment 1, only the following parameters are adjusted:
[0088] Set the chroma modulation factor of blue sky and green tree in the memory color to t 2 = 1,
[0089] The chroma modulation factor for non-memory colors is set to t 3 = 1.3.
Embodiment 3
[0091] The method of embodiment 3 is the same as embodiment 1, only the following parameters are adjusted:
[0092] Set the chroma modulation factor of blue sky and green tree in the memory color to t 2 = 1.3,
[0093] The chroma modulation factor for non-memory colors is set to t 3 = 1.5.
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Abstract
The invention discloses an image repetition quality improving method of a large-color-gamut display device in order to solve the technical problem that repeated image quality is poor in image repetition of an existing large-color-gamut display device. The method includes the following steps that a digital drive value of each pixel is extracted; the digital drive value of each pixel is converted into a CIE tri-stimulus value corresponding to the digital drive value; a color appearance space amount of each CIE tri-stimulus value is calculated through a CIECAM02 model; color appearance space amounts subjected to pixel modulation are obtained; gain coefficients and gamma coefficients of a red channel, a green channel and a blue channel are calculated respectively; a reverse characteristic model is built; the color appearance space amounts are converted into modulated CIE tri-stimulus values; the modulated CIE tri-stimulus values are converted into modulated digital drive values by means of the reverse characteristic model. By means of the method, repeated image quality can be effectively improved, reality sense of memory color and the colorful vision effect of non-memory color are guaranteed, and the method can be used for image display of smart mobile phones, tablet computers and other intelligent mobile terminals.
Description
technical field [0001] The invention belongs to the field of color science and image technology, and relates to a method for improving the quality of image reproduction, in particular to a method for improving the quality of image reproduction for large color gamut display devices, which can be used for intelligent mobile terminals such as smart mobile phones and tablet computers image display. Background technique [0002] Color gamut refers to the maximum range of colors that a digital image display device can display. As one of the important performances of a display device, a large color gamut can enable the display device to have stronger color expression when reproducing images, and obtain a more vivid and gorgeous vision. Effect. With the rise of new technologies such as AMOLED (Active matrix organic light emitting diode), display devices with large color gamut performance are rapidly promoted, and are now popular in desktop monitors, portable computers, tablet compu...
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Application Information
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