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Color recovery method and system

A color recovery, color technology, used in image data processing, instruments, electrical components, etc.

Inactive Publication Date: 2009-07-22
IND ACADEMIC CORP FOUND YONSEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with the present invention is that the equi-large algorithm does not work on a stable basis, thus requiring its correction parameters to be adjusted again according to the severity of the unique color problem

Method used

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  • Color recovery method and system
  • Color recovery method and system

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Embodiment Construction

[0015] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Reference numerals of components in each figure are referred to the same reference numerals for simplicity of description of the drawings. In describing the invention herein, if a detailed description about a related known structure or function is considered to make an aspect of the invention unclear, the detailed description may be omitted. Also, preferred embodiments of the present invention are described below, but it will be apparent to those skilled in the art that various modifications and changes can be made thereto without departing from the scope and spirit of the present invention.

[0016] figure 1 is a block diagram of a color restoration system according to an exemplary embodiment of the present invention.

[0017] The color restoration system 10 restores the color of a digital image distorted by illumination by using the pr...

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Abstract

The present invention relates to a color recovery method and system, and more specifically, to a color recovery method and system that recovers colors of digital images distorted due to lighting by using a principle of implementing color constancy based on a human vision system. The present invention comprises: a) determining criterion region in consideration of variance values for each color channel of images to be recovered; b) computing relative surface reflectance for the determined criterion regions and computing adjustment coefficients for excluding distortion effects of a light source using the computed relative surface reflectance; and c) recovering the colors for the images by using the adjustment coefficient. With the present invention, the distorted colors of digital images due to the spectral bias of a light source can be easily recovered in a very fast single step operation free from the unique color problem, one of the worst problems in the field of color correction technology so-far known as impossible to solve, if and only if there is a sub-region in a digital image containing sufficient number of surface elements of different reflectance.

Description

technical field [0001] The present invention relates to a color restoration method for restoring digital images distorted due to illumination by applying the principle of achieving color consistency. Background technique [0002] When image distortion occurs due to illumination, it is theoretically impossible for any system to recover the exact undistorted color values ​​of the image (i.e., those obtained under balanced standard light conditions, or the colors defined by the spectral surface reflectance value). This is because the image only contains light information reflected from the surface of the object, not the light source itself. However, through the well-known "color constancy" function, the human visual system can do a good job of approximating the true color values ​​of an image by eliminating or minimizing the distorting effects of lighting. [0003] Although there is a need to apply this principle of color consistency to image processing techniques, there have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60
CPCH04N1/62H04N1/6086H04N1/6027G06T5/001G06T2207/10024G06T5/00
Inventor 郑灿燮
Owner IND ACADEMIC CORP FOUND YONSEI UNIV
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