Automatic white balance method

An automatic white balance and image data technology, which is applied in image data processing, instruments, character and pattern recognition, etc., can solve the problems of increased number of false alarms, difficulty in cutting, judging two objects, etc. Accuracy, quality-enhancing effects

Active Publication Date: 2009-12-23
VATICS
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Problems solved by technology

[0010] As a result, the accuracy of existing object segmentation algorithms has not yet reached a satisfactory level, so there are many limitations in application, such as:
[0011] 1. When the object is quite close to the background color feature, the existing object cutting algorithm is not easy to cut accurately
[0012] 2. The existing object cutting algorithm is prone to the phenomenon that the object is disconnected due to inadvertent cutting (suc

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Embodiment Construction

[0046] Please refer to Figure 4 , which shows the flow chart of the automatic white balance method in the preferred embodiment of the present invention. This method is suitable for image processing, wherein, at time t (i.e., the t-th frame), the second image data (t-1, t-2, ..., t-n frame) is generated at the same time as the first image Before the data (the t-th frame), the method includes the following steps: the method inputs the first image data (S402). Afterwards, according to the preset color gain table, the method adjusts the color of the first image data (S404). Next, the method executes an object detection procedure to remove at least one foreground object and obtain the target background (S406). Next, the method ignores the foreground object, and only performs color difference analysis on the target background (S408). Thereafter, according to the result of the aforementioned color difference analysis, the method determines image gain parameters (R, G, B) (S410). ...

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Abstract

The invention discloses an automatic white balance method and relates to an image adjustment method, which is suitable for image processing, wherein the time of generating second image data is before the time of first image data. The method comprises the following steps: imputing the first image data; adjusting the color of the first image data according to a color gain table; executing an object detection procedure so as to remove at least one foreground object and obtaining a target background; and carrying out color difference analysis on the target background so as to decide at least one image gain parameter. The invention can automatically adjust white balance by carrying out the color difference analysis on the background.

Description

technical field [0001] The present invention relates to a method for image adjustment, and in particular to a method for automatically adjusting white balance through background color difference analysis. Background technique [0002] Under different ambient light sources, the image will show different degrees of color shift. White balance (Auto-White-Balance) control is used to adjust the phenomenon of color shift, with the goal of restoring the white in the image (reference white) to the white in the real scene. In the conventional white balance control method, the user inputs lighting conditions, such as sunset, incandescent light bulb, etc., or directly provides the reference white area in the picture. Auto white balance is for the system to detect the external ambient light source by itself to correct the color shift. However, there are many disadvantages in the existing automatic white balance technology, for example, objects that frequently enter and leave the pictu...

Claims

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Application Information

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IPC IPC(8): H04N9/73G06K9/00G06T5/00G06T7/20
Inventor 连国钦张永基
Owner VATICS
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