Method of deciding image local information change minimum direction using multiple decision

A local information, majority decision technology, applied in the direction of image signal generator, color signal processing circuit, etc., can solve problems such as judgment errors

Inactive Publication Date: 2007-07-18
ALTEK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] This method is simple and effective when the color information of the image changes significantly. However, when the horizontal gradient value ΔH and the vertical gradient value ΔV are similar, judgment errors

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  • Method of deciding image local information change minimum direction using multiple decision
  • Method of deciding image local information change minimum direction using multiple decision
  • Method of deciding image local information change minimum direction using multiple decision

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Embodiment Construction

[0038] The present invention uses a plurality of evaluation values ​​representing color information changes to judge the direction with the least change in local information of the image by majority decision. The evaluation values ​​include those directly generated from the color values ​​of the pixel of interest and its adjacent pixels, for example, calculated by different methods The difference between the gradient values ​​of the color values ​​in different directions, or indirectly generated from the color values ​​of the pixel of interest and its adjacent pixels, for example, select the flag values ​​of multiple adjacent pixels of the pixel of interest, each flag value Record the trend of color information change at the corresponding pixel.

[0039] In one embodiment, a method for judging the direction in which local information of an image changes the least by majority decision includes using at least three odd-numbered different methods to calculate the gradient value of...

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Abstract

This invention relates to a method for utilizing majority decisions to judge the direction with the least image local information change including: getting multiple evaluation values of color information changed direction at an interested pixel place on at least two image directions and applying majority decisions to decide the direction with the least image local information change in the direction expressed by said multiple evaluation values, each value is taken from the difference value of the grads value of the color value at the interested image place or the flag value of the adjacent image of the interested image to express a trend of its color information change to increase the accuracy of judgement.

Description

technical field [0001] The invention relates to a method for judging the direction of the least change of local information of a color image, in particular to a method for judging the direction of the least change of local information of a color image by majority decision. Background technique [0002] When using Color Filter Array Interpolation (CFAI) to reconstruct the color information of a digital image, it is often necessary to determine the direction in which the local information of the image changes the least. Then compare the magnitude of the gradient value in different directions. The direction with the smaller gradient value is the direction with the least change in the local information of the image, and then use the color values ​​of adjacent pixels in this direction to interpolate the required color value . Taking the 5×5 pixel array 100 in FIG. 1 as an example, R, G and B in the figure represent the color values ​​of red, green and blue respectively, and the ...

Claims

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Application Information

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IPC IPC(8): H04N9/04H04N9/64
Inventor 廖明俊郭俊廷张尹彬
Owner ALTEK CORP
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