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Method and system for treating image by AC type plasma displayer

A plasma display and image processing technology, applied in the field of image processing, to achieve the effect of eliminating visual noise and improving display capabilities

Inactive Publication Date: 2009-09-23
四川世纪双虹显示器件份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From this diffusion mode, we can know that the error values ​​of RGB diffusion in the same direction are completely superimposed on the adjacent pixels, so that the increase in the brightness value of adjacent pixels is more obvious, and it is more likely to become a prominent pixel.

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  • Method and system for treating image by AC type plasma displayer
  • Method and system for treating image by AC type plasma displayer
  • Method and system for treating image by AC type plasma displayer

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Embodiment Construction

[0026] Due to the general error diffusion algorithm (such as Figure 5 As shown), the RGB three primary colors follow the same diffusion mode, that is, the same error weighting coefficient and the same diffusion direction, but the brightness density of G is significantly greater than that of R, R, and For the luminance density of B, the ratio between the luminance densities of RGB is 0.26:0.70:0.27. Therefore, if the error diffusion of grayscale occurs, the diffusion errors of G, R, and B are superimposed (that is, the three of them diffuse at the same time. to a certain pixel), the brightness of the superimposed pixel will increase significantly, causing such as Figure 4 Visual noise shown.

[0027] Therefore, the present invention intends to adopt a method combining improved error diffusion and dithering algorithm to suppress visual noise and improve display capability. First of all, when determining the diffusion error of the gray scale, it is not simply to diffuse the d...

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Abstract

The invention discloses a method and a system for treating an image by an AC type plasma displayer. The method comprise the following steps of: setting comparison threshold values for all pixels; comparing the summation of fractional parts of grey values of all pixels after inverse gamma correction and diffusion errors of adjacent pixels of all pixels with the corresponding comparison threshold value; determining display grey values of all pixels according to the comparison result; and, diffusing the grey values of all pixels after the inverse gamma correction and the errors between the determined display grey values to the adjacent pixels of all pixels. By the method and the system, the low grey scale display capability of the AC type plasma displayer can be improved, and the visual noise of an image dark field can be eliminated.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image processing method and system for an AC plasma display. Background technique [0002] AC plasma display (AC-PDP) is realized by subfield separation technology when displaying gray levels. Different subfields have different weights. The combination of subfields with different weights realizes the display of multiple gray levels. Therefore, the display brightness density of the plasma display has a linear characteristic relationship with the input gray level. However, due to the development of traditional displays and the dominance of the previous Cathode Ray Tube (CRT), the current image and video transmission signals are designed to compensate for the nonlinearity of CRT electro-optical conversion (that is, the grayscale brightness density and The input gray value has a non-linear relationship), and the Vo=Vi^r operation is performed on the image signal before it is trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/288H04N5/202
Inventor 雷伟林
Owner 四川世纪双虹显示器件份有限公司