White balance adjusting method and device

An adjustment method and white balance technology, applied in the field of image processing, which can solve the problems of not further considering the specific factors of sunlight, misjudgment of light source, etc.

Active Publication Date: 2013-07-31
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the above method can tell whether the type of the current light source is fluorescent lamp or sunlight, it does not further consider the specific factors of sunlight, and is easily affected by the brightness intensity of pixels. Using the above method to adjust the white balance often easily leads to misjudgment of the light source

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  • White balance adjusting method and device

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Embodiment Construction

[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0089] The embodiment of the present invention provides a white balance adjustment method, such as figure 1 shown, including:

[0090] 101. Acquire RGB pixel values ​​of pixels in an input image.

[0091] Wherein, the pixel points are the pixel points on the input image of the same frame collected by the device, and, in the embodiment of the present invention, the RGB pixel values ​​are expressed in RGB format.

[0092] 102. Determine a green pixel point and a gr...

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Abstract

The invention relates to the field of image processing, and discloses a white balance adjusting method and device. The method includes the following steps: obtaining the corresponding RGB pixel values through distinguishing green pixels and grey pixels; confirming impossible light source points as per the RGB pixel values respectively corresponding to the green pixels and the grey pixels; then performing comprehensive judgment as per the impossible light source points to confirm the accurate actual color-ratio factor of the light source points; then calculating the white balance gain value as per the accurate actual color-ratio factor of the light source points; and finally performing the white balance adjustment.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a white balance adjustment method and device. Background technique [0002] Due to the difference in the principle of color perception between the human eye and the camera image sensor, the camera cannot display the same color for the same object under different light sources, and there will be color cast. In order for the camera to obtain the same color as the human eye sees, it is necessary to introduce automatic white balance to process the image of the camera. The purpose of automatic white balance is to restore white objects to white regardless of the light source. [0003] This problem can adversely affect the performance of the automatic white balance algorithm because the color of gray objects under some light sources may be confused with the color of non-gray objects under other light sources. For example, the color of a green object under outdoor sunlight is very simil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73
Inventor 左坤隆
Owner HUAWEI TECH CO LTD
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