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Method for realizing color interpolation of value correction of exceptional points

a value correction and interpolation method technology, applied in the field of color interpolation, can solve problems such as adverse effects of color interpolation results, and achieve the effects of preventing diffusion of exceptional color values, and reducing the number of exceptional points

Inactive Publication Date: 2009-07-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for color interpolation that can improve image quality by correcting exceptional points in an image. The method involves establishing a matrix for color interpolation, correcting the known color value of the center point, determining a reference direction for interpolation, and interpolating for the two unknown color values of the center point. The method can eliminate exceptional points, prevent diffusion of exceptional color values, refine image details, enhance image boundaries, and prevent pseudo colors.

Problems solved by technology

However, with such methods, if any exceptional point occurs in the BAYER matrix, the exceptionality will diffuse to the interpolation for the surrounding points, and thereby strongly influences the result of color interpolation; in addition, utilizing a specific method solely often results in image blur on the boundaries or pseudo colors in fine structures, which has adverse effect to the result of color interpolation.

Method used

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  • Method for realizing color interpolation of value correction of exceptional points
  • Method for realizing color interpolation of value correction of exceptional points
  • Method for realizing color interpolation of value correction of exceptional points

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Embodiment Construction

[0020]Please see FIG. 1-FIG. 5, the color interpolation method for realizing value correction for exceptional points in the present invention utilizes a 5×5 Bayer matrix to realize interpolation in the image. The 5×5 Bayer matrix may be in either of the following two cases: 1) the known color of the center point is Blue (as shown in FIG. 1) or Red (as shown in FIG. 4), and the green points are in the same positions; 2) the known color of the center point is Green, and the positions of Red points and the positions of Blue points are interchangeable, as shown in FIG. 2 and FIG. 3.

[0021]In the first case, the interpolation method comprises the following steps:

[0022]1) establishing a matrix for color interpolation: a point at which interpolation is to be carried out is set as the center point to establish a 5×5 Bayer matrix, in which each point is represented by one known color and two unknown colors, the three colors being R, G, and B, and the known color of the center point is R or B;...

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Abstract

A method for realizing color interpolation of the value correction of exceptional points is disclosed. The method includes the following steps: the certain point in the BAYER matrix is set as the center to establish a 5×5 interpolation matrix, in which each point is represented by one known color and two unknown colors and the known color of the center is R or B; the known color of the center point is corrected based on the known color value of the known points in the matrix with the same color as that of the center point; the color change trends along both row and column directions in which the center point is located are judged to select the row direction or column direction in which the center as the reference direction of the interpolation calculation; and the two color values of the center point are interpolated.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method for color interpolation, and more specially to a method that is designed to realize value correction of exceptional points along with color interpolation for a Bayer color matrix obtained during the process of digital image processing.BACKGROUND OF THE INVENTION[0002]During the process of digital image processing, color interpolation must be carried out for the image obtained by a BAYER color matrix, so as to recover the image colors. Most existing methods realize interpolation for the pixel points with spatial correlation or color correlation. However, with such methods, if any exceptional point occurs in the BAYER matrix, the exceptionality will diffuse to the interpolation for the surrounding points, and thereby strongly influences the result of color interpolation; in addition, utilizing a specific method solely often results in image blur on the boundaries or pseudo colors in fine structures, which has advers...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06K9/00H04N5/367
CPCG06T3/4015H04N2209/046H04N9/045H04N5/3675H04N25/683H04N23/843H04N25/134H04N9/67H04N9/64
Inventor ZHU, ZIYU
Owner BYD CO LTD
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