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Image sharpening method for TFT-LCD color display

A technology for image sharpening and color display, applied in the field of image sharpening, can solve unresolved problems such as color distortion, achieve obvious sharpening effect, occupy less storage space, and reduce noise

Inactive Publication Date: 2011-09-21
西安龙腾微电子科技发展有限公司
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Problems solved by technology

[0006] However, this image sharpening method has the following defects: first, when calculating the gray value increase, it is necessary to consider the 8 pixels around the current pixel
Third, this sharpening method does not solve the problem of color distortion after image sharpening

Method used

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  • Image sharpening method for TFT-LCD color display
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  • Image sharpening method for TFT-LCD color display

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Embodiment Construction

[0031] refer to Figure 1~2 , in the figure, A, B, C, D, E are five adjacent pixels in a row of the image, they form a pixel processing unit, and pixel C is the current pixel to be processed.

[0032] In step 410, the gray value increase Z of the red component R of the pixel point C can be obtained by formula (1) R , where A R , B R 、C R 、D R ,E R are the gray values ​​of the red components R of pixels A, B, C, D, and E, respectively;

[0033] Z R =[(C R -A R )+(C R -B R )+(C R -D R )+(C R -E R )] / 4 (1)

[0034] Similarly, using equations (2) and (3), the grayscale increase value Z of the green component G and the blue component B of the pixel point C can be obtained respectively G and Z B , where A G , B G 、C G 、D G ,E G are the gray values ​​of the green components G of pixels A, B, C, D, and E respectively, and A B , B B 、C B 、D B ,E B are the gray values ​​of the blue component B of pixels A, B, C, D, and E, respectively.

[0035] Z G =[(C G -A ...

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Abstract

The invention discloses an image sharpening method for TFT-LCD color display. Taking adjacent five pixel points in a row as a processing unit, the image sharpening method can reduce the storage capacity and the calculation amount, is particularly suitable for color display of a small-size TFT-LCD and easy to be realized in a singlechip-integrated TFT-LCD drive control chip. The visual characteristic of human eyes is considered, sharpening factors are calculated according to the gray value of pixel points, and the image sharpening noise is reduced. By adopting zoom factors and different sharpening strengths aiming at five image areas with the gray changing from the flatness to the sharpness, the invention better solves the problem of the gray value overflow; and by using an energy dispersion filter, the invention obviously improves the color distortion phenomenon of sharpened images.

Description

technical field [0001] The invention relates to an image sharpening method, in particular to an image sharpening method applied to small-size TFT-LCD color display. Background technique [0002] refer to image 3 , the document "Patent Publication No. CN1812475A Chinese Patent" discloses an image sharpening method and device. This image sharpening method uses a non-linear visual function, according to the gray level difference between the current pixel and each surrounding adjacent pixel, determines the multiple sharpened gray scale increments of the current pixel, and then each sharpened The grayscale increments are added to obtain the total sharpened grayscale increment, and the total sharpened grayscale increment is added to the grayscale value of the current pixel to finally obtain the sharpened grayscale value of the current pixel. The specific process is described as follows: [0003] Suppose E is the current pixel to be processed, A, B, C, D, F, G, H, I are the 8 ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64G09G3/36
Inventor 魏廷存郭振华孙凯袁涛李博
Owner 西安龙腾微电子科技发展有限公司
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