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A method and system for calibrating image color

An image and color technology, applied in the field of image color calibration, can solve the problems of abnormal skin tone, complex light source, non-standard color temperature of incandescent lamps and fluorescent lamps, etc.

Active Publication Date: 2018-08-14
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indoor light sources are often more complicated, and the color temperature of incandescent lamps and fluorescent lamps is not very standard
Therefore, shooting portraits indoors often leads to abnormal skin tones, yellowish or bluish

Method used

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  • A method and system for calibrating image color
  • A method and system for calibrating image color
  • A method and system for calibrating image color

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Embodiment Construction

[0060] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0061] Such as figure 1 As shown, the embodiment of the present invention provides a method for calibrating image color, the method comprising:

[0062] S10, performing face recognition on the image processed by automatic white balance, if the recognition is successful, then determine the face area, and calculate the red, green and blue RGB statistical values ​​of the face area;

[0063] S20, calculating the corrected white balance gain of the red, green and blue RGB three channels required to correct the RGB statistical value of the face area to the RGB value of the ideal f...

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PUM

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Abstract

The invention discloses a method for calibrating the color of an image. The method includes: performing face recognition on an image processed by automatic white balance, if the recognition is successful, determining the face area, and calculating the red, green, blue, RGB values ​​of the face area Statistical value; calculate the corrected white balance gain of the three channels of red, green and blue RGB required to correct the RGB statistical value of the face area to the RGB value of the ideal face model; according to the corrected three channels of red, green and blue RGB The white balance gain of the white balance process is re-executed on the image processed by the automatic white balance process. The invention can make the color presented by the processed image closer to the color seen by human eyes and improve the image quality. The invention also discloses a system for calibrating image color.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and system for calibrating image color. Background technique [0002] Color temperature (colo(u)r temperature) is a scale indicating the light color of the light source, and the unit is K (Kelvin). Color temperature has important applications in photography, video, publishing and other fields. The color temperature of a light source is determined by comparing its color to a theoretical hot black body radiator. The Kelvin temperature at which a hot black body radiator matches the color of a light source is the color temperature of that light source, and is directly related to Planck's black body radiation law. [0003] The human eye perceives the brightest objects as white at any color temperature. The photos taken by the camera at different color temperatures show different colors, for example, the photos under the D65 light source are bluish, while t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/73H04N5/243H04N23/76
CPCG06T2207/10024G06T2207/30201H04N1/6077G06T7/90G06V40/16H04N23/88
Inventor 马亮
Owner ZTE CORP
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