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Image processing method

An image processing and image technology, applied in the field of image processing, can solve the problems of insufficient image color saturation, color gamut reduction, etc., and achieve the effect of improving the display effect and improving the vividness of the image color

Active Publication Date: 2015-11-25
XIAN NOVASTAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects and deficiencies in the prior art, the present invention provides an image processing method to solve the problem of insufficient color saturation or reduced color gamut of an image displayed by a display device under ambient light

Method used

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no. 1 example

[0025] The following will combine image 3 and Figure 4 The image processing method of the first embodiment of the present invention will be described. Specifically, the image processing method of this embodiment can be implemented using the following technical solutions:

[0026] Firstly, the acquired original image is converted from RGB color space to LCH color space. Specifically, the original image may be converted from the RGB color space to the Lab color space, and then from the Lab color space to the LCH color space; since the RGB color space, the Lab color space and the LCH color space are all known color spaces, their mutual The conversion formula of is a well-known technology, so it will not be repeated here.

[0027] Next, the brightness information of each pixel of the original image in the LCH color space can be extracted, and the brightness information can be mapped to improve the overall contrast of the image; the specific mapping processing method can be: a...

no. 2 example

[0040] The following will combine Figure 5 The image processing method of the second embodiment of the present invention will be described. Specifically, the image processing method of this embodiment can be implemented using the following technical solutions:

[0041] Firstly, the acquired original image is converted from RGB color space to Lxy color space. Specifically, the original image may be converted from the RGB color space to the XYZ color space, and then converted from the XYZ color space to the Lxy color space; since the RGB color space, the XYZ color space and the Lxy color space are all known color spaces, their mutual The conversion formula of is a well-known technology, so it will not be repeated here.

[0042] Next, the brightness information of each pixel of the original image in the LCH color space can be extracted, and the brightness information can be mapped to improve the overall contrast of the image; the specific mapping processing method can be: a) g...

no. 3 example

[0051] The main difference between the third embodiment of the present invention and the aforementioned first embodiment and the second embodiment is that the third embodiment does not calculate the degraded image based on the measurement of ambient light intensity, but uses direct measurement. details as follows:

[0052] First obtain the chromaticity measurement value obtained by directly measuring the chromaticity value of the screen image (that is, the degraded image under the influence of ambient light) when the display device displays the original image under ambient light by using equipment such as a light probe and a chromaticity sensor;

[0053] Next, get the difference between the chromaticity value of the original image and the chromaticity measurement of the screen image

[0054] Afterwards, the color saturation compensation method of the first embodiment or the color gamut expansion method of the second embodiment can be used to perform chromaticity compensation o...

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Abstract

The invention relates to an image processing method which comprises the following steps: (a), obtaining an original image and a degraded image obtained by adding ambient light base color into the original image; (b), obtaining a chromaticity difference between the original image and the degraded image; and (c), carrying out chromaticity compensation on the original image by using the chromaticity difference so as to obtain a compensated image. According to the invention, chromaticity compensation such as color saturation compensation or color gamut range expanding is carried out on the original image according to ambient light conditions, therefore, color brightness of the image displayed under the ambient light is improved and a display effect of display equipment is improved greatly.

Description

technical field [0001] The invention relates to the technical field of image processing and display, in particular to an image processing method. Background technique [0002] Display devices are more and more widely used outdoors, such as mobile phone display screens and large-scale LED display devices, etc., but the reflection of the display screen on the ambient light will affect the display effect of the display device, resulting in a dark display, a decrease in contrast, and saturated colors. The degree of brightness is reduced, the vividness of the color is reduced, etc. figure 1 It is the effect picture observed on the indoor display device, figure 2 It is the effect picture observed on the display device under simulated outdoor ambient light. figure 1 and figure 2 It can be seen that the effect of observation under outdoor ambient light is that the displayed image is dim, the contrast is reduced, and the color saturation is reduced. Therefore, it is very import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/02G09G5/10G09G3/20
Inventor 杨城袁胜春李佳
Owner XIAN NOVASTAR TECH
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