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A Method for Correcting LCD Color Shift

A color shift, green technology, applied in the field of LCD color shift correction, can solve problems such as sawtooth, and achieve the effect of speeding up the convergence speed, improving the color reproduction ability, and improving the accuracy of quantitative classification.

Inactive Publication Date: 2016-01-20
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the process of learning, there will be sawtooth phenomenon, and even fall into the local minimum

Method used

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  • A Method for Correcting LCD Color Shift
  • A Method for Correcting LCD Color Shift
  • A Method for Correcting LCD Color Shift

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Embodiment Construction

[0021] An LCD color shift correction method proposed by the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 Shown, a kind of LCD color shift correction method work flowchart of the present invention, its specific process is as follows:

[0023] Step 1: In the present invention, the RGB color space is evenly distributed in 10*10*10 small cubic spaces, and a total of 1000 samples are obtained. And select 400 representative samples from 1000 samples as neural network training samples.

[0024] Step 2: Select a screen to be calibrated and a standard screen, use a high-definition digital camera to shoot the LCD display image, and obtain their color values, which are recorded as RGB. The operating platform is WindowsXP, the development language is VC++6.0, based on the OpenGL graphics library.

[0025] Step 3: Extract and standardize the color feature vector of the screen to be cal...

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Abstract

The invention provides an LCD color deviation correction method. According to the method, a BP neural network based on genetic algorithm is introduced, wherein the genetic algorithm is used for performing rapid global searching on an initial weight value and a threshold value of the neural network, and thus a defect that conventional BP algorithm is easy to be trapped into a local minimum is overcome, a rate of convergence is fastened, and the generalization ability of the network is improved. Better quantification classification accuracy is provided by adopting Lab color space values as input output values of the neural network than directly adopting RGB color space vectors, and thus the LCD color deviation can be automatically corrected, and the LCD can have better color reproduction ability.

Description

technical field [0001] The invention belongs to the field of display technology and relates to a method for correcting LCD color shift. Background technique [0002] With the development of display technology, liquid crystal display screens are widely used in various electronic devices. People have higher and higher requirements for the color of LCD screens. Color reproduction is an important indicator for evaluating LCD screens, but LCD screens under different lighting environments will cause a certain deviation between the color of the collected image and the object itself; under different hardware equipment environments, it will also cause the input The output image has color casts. How to correct the color deviation has become a hot spot in current research. [0003] LCD display colors are usually defined using the RGB color space. However, the RGB color space is closely related to the device, and the colors displayed by different devices will be different. If the RG...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00G09G3/36G06N3/08
Inventor 高超杨乐
Owner NANJING UNIV OF INFORMATION SCI & TECH
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