Method of color correction

Abstract

This invention relates to a color emendating method. The color measuring system respectively selects the plural groups of gray-rank value and the gray-rank representing value of the display lamp source of display, and respectively have numerical value calculation to the selected information of every color of light, then obtains the fitting curve function of gray-rank value data in every curve fitting section. Obtain the fitting gray-rank representing value of the gray-rank value in the sections using the fitting curve function, and tabular a comparison table. Besides, to correspond an unitary gamma curve of the image gray-rank formation to an object curve set beforehand. Logarithmize the two curves firstly when corresponding, get the emendated gray-rank signal through the comparison table. Output the emendated gray-rank signal to present the gray-rank distributing state by display. It's suitable for all kinds of display, especially for the liquid crystal display.

Description

technical field [0001] The present invention relates to a color correction method, in particular to a color correction method for allocating the distribution state of the original gray-scale expression value of image data. A look-up table, by which the correction gray-scale signal can be quickly obtained to provide the display to adjust the gray-scale distribution state, which is especially suitable for color image processing of the liquid crystal display. Background technique [0002] Liquid Crystal Display (LCD for short) is a kind of flat-panel display in optoelectronic products. It has many advantages such as small size, light weight, thin thickness, low power consumption, no flicker, and no radiation. , affected by the properties of liquid crystal molecules, such as viscosity coefficient, dielectric constant, and elastic coefficient, etc., there will be problems of long response time and afterimage phenomenon. Therefore, it is necessary to improve the image quality with...

AI Technical Summary

Problems solved by technology

In the process of image color switching, if two adjacent pixels turn on or off at the same time, a flicker phenomenon (flicker phenomenon) will occur, which makes people feel uncomfortable. Therefore, in order to eliminate this phenomenon, it is necessary to make the two pixels produce different grays. Level value, generated by corresponding the original grayscale value of the original gamma curve to a target curve, the target curve is established according to the characteristics of the LCD panel, or one of the RGB gamma curves is set as The target curve is then processed by FRC technology with the corrected grayscale signal obtained after the correspondence, and the grayscale state is displayed on the display; in the past known technology, the color processing method will be as shown in Figure 2, through a color light The original grayscale value of the gamma curve will correspond to the grayscale performance value on a target curve after step 1, which is the brightness pointed to by step 2. This brightness can be expressed by the grayscale value of the original gamma curve at 128.5, That is the method of step 3. However, the grayscale value is between 128 and 129, so it is necessary to increase the operation bit from 8 bits to 9 bits, and use linear interpolation to obtain the corresponding grayscale expression value. If the middle grayscale value is between 128.5 and 129 or between 128 and 128.5, the calculation bit must be increased to more than 10 bits, which is a burden on hardware resources, and the linear interpolation method cannot be quickly and accurately corresponded to objective function

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