Method for processing color image, color processing device and color processing program

A color image and processing method technology, applied in image data processing, image data processing, image communication, etc., can solve the problems of object texture reduction, variance reduction, appearance texture reduction, etc., and achieve the effect of improving texture

Active Publication Date: 2013-05-08
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] As in Patent Document 1, in the color image processing method using RGB of color image data and three color attributes such as hue, color saturation, and brightness, there is a problem that the texture of the original object is degraded.
If this processing is performed on the entire object area, the variance of color information or pixel values ​​in the object area will be reduced, and the texture of the appearance in the object area will be degraded.

Method used

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  • Method for processing color image, color processing device and color processing program
  • Method for processing color image, color processing device and color processing program
  • Method for processing color image, color processing device and color processing program

Examples

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Embodiment

[0085] figure 1 is a flowchart illustrating a color image processing method according to an embodiment of the present invention. Here, for the convenience of description, let the color specification system of the image be the RGB color specification system. That is, let the color of the image be represented by a combination of R (red), G (green), and B (blue), marked with color information RGB. Of course, the present invention is also applicable to color systems other than RGB.

[0086] In order to improve the texture of a specific object in an arbitrarily given color image, recalculation of the reproduced color in each pixel of the object in the color image is performed.

[0087] The specific object here, even if the individual is different, that is, there is an individual difference, since rough color information and texture are common, so as long as it can be identified based on the characteristics obtained from the color image, it is not particularly limited. .

[0088...

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Abstract

Spectral power distribution of an illumination is restored using color information in a region of the specific object in an input image and a pre-specified representative surface reflectance of the specific object. The surface reflectance in the region of the specific object is restored from the color information and the spectral power distribution of the illumination. The surface reflectance is corrected using three or more pre-specified reference surface reflectances of the specific object. The color in the region of the specific object is calculated from the spectral power distribution of the illumination and the corrected surface reflectance.

Description

technical field [0001] This invention claims priority based on Japanese Patent Application: Japanese Patent Application No. 2008-041605 (filed on February 22, 2008), and the entire description content of this application is incorporated in this specification by reference. [0002] The present invention relates to image processing of color images, in particular to a color image processing method, a color image processing device, and a color image processing program, which are actually used to realize the color of objects in a color image captured by a color image machine. Corrects and reproduces the desired color of the object, and improves texture. Background technique [0003] As a method of improving the quality of a color image captured by a color imaging device, a method is proposed in which the color of a specific object (skin color, green grass, green trees, blue sky, etc.) in a color image is made close to the object Memory color, to reproduce satisfactory color. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/46G06T1/00H04N1/60
CPCH04N1/62G06T7/408H04N1/6086G06T7/90
Inventor 塚田正人
Owner NEC CORP
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