White balance correcting method and white balance correcting device

A calibration method and a technology of a calibration device, which are applied in the field of white balance calibration, can solve problems such as the difficult effect of the calibration method, and achieve the effect of good applicability, good effect, and avoiding errors

Active Publication Date: 2013-09-11
湖南兴芯微电子科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that when the scene is under more than one color temperature light source, or under other color temperature light sources, it will make it difficult for this correction method to produce better results.

Method used

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  • White balance correcting method and white balance correcting device
  • White balance correcting method and white balance correcting device
  • White balance correcting method and white balance correcting device

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Embodiment Construction

[0018] The white balance correction method and device provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Firstly, a specific implementation manner of the white balance correction method of the present invention is given.

[0020] attached image 3 Shown is the flow chart of the white balance correction method described in this specific embodiment, and then the attached image 3 The steps shown are described in detail.

[0021] S310: Acquiring white object images under various color temperature light sources. That is, multiple images of white objects are captured under several common color temperature light source environments.

[0022] S320: Set the areas densely populated with white pixels in all the white object images as automatic white balance correction areas.

[0023] Wherein, the step S320 may be further executed by using steps S321-S323.

[0024] S321: Calculate the XY coordinate values ​​cor...

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Abstract

The invention provides a white balance correcting method and a white balance correcting device. The white balance correcting method includes steps of (1), acquiring white object images in various color temperature light sources; (2), setting white pixel dense regions in all the white object images as automatic white balance correcting regions; (3), acquiring an image, counting pixels, which are within ranges of the automatic white balance correcting regions, of the image, judging whether the quantities of the pixels exceed a set threshold value or not, and automatically correcting the white balance of the image according to following steps if the quantities of the pixels exceed the threshold value; (4), counting R (red), G (green) and B (blue) accumulated values of the pixels, which are within the ranges of the automatic white balance correcting regions, of the image; (5), computing white balance correcting values according to the counted accumulated values and correcting R, G and B components of the full image by the aid of the white balance correcting values. The white balance correcting method and the white balance correcting device have the advantages of high applicability and excellent effect when the white balance correcting method is used for removing processing for images with single color backgrounds and various color temperature light source mixtures.

Description

technical field [0001] The present invention relates to a white balance correction method, in particular to a white balance correction method and its device which are applied to an image processing device or method to adjust the white balance according to one or more light source environments with different color temperatures. Background technique [0002] When a digital image sensor is used to capture a scene, the captured scene will be affected by the color temperature of the light source. Even an object that is originally white will not look white, but will show an obvious color cast. And our visual system will automatically compensate for different color temperature light sources, so no matter what kind of color temperature light source environment we see a piece of white paper will always be white. Therefore, it is necessary to perform white balance correction on the image captured by the digital image sensor to compensate for the color shift phenomenon caused by the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73
Inventor 周宇周文生
Owner 湖南兴芯微电子科技有限公司
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