White balance adjusting method, device and mobile terminal

An adjustment method and technology of an adjustment device, which are applied in the field of image processing and can solve problems such as inaccurate calculation and inaccurate white balance calculation.

Inactive Publication Date: 2018-03-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a common problem in the current mobile phone photography: in the FOV (Field of View, field of view), the photos taken under two or more light sources with large color temperature differences have the problem of inaccurate white balance calculation.
Current mobile phones can only adjust the white balance of the entire photo according to one color temperature scene for photos taken in a mixed color temperature scene, or use a variety of color temperature scenes to calculate the white balance. The white balance calculated by these methods can be calculated. inaccurate question

Method used

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  • White balance adjusting method, device and mobile terminal
  • White balance adjusting method, device and mobile terminal
  • White balance adjusting method, device and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0040] In the first embodiment of the present invention, a white balance adjustment method, such as figure 1 shown, including the following specific steps:

[0041] Step S101: Divide the image into different regions according to the color temperature scene.

[0042] Specifically, step S101 includes:

[0043] According to the corresponding relationship between the three primary color features of each pixel in the image and the three primary color features of the color temperature scene, determine the color temperature scene to which each pixel in the image belongs;

[0044] According to the color temperature scene to which each pixel in the image belongs, the image is divided into regions corresponding to each color temperature scene.

[0045] Further, the three primary color characteristics of each pixel in the image include: the R / G value and B / G value of each pixel in the image calculated through the existing white balance calculation algorithm.

[0046] The three primary...

no. 3 example

[0070] In the third embodiment of the present invention, a white balance adjustment device, such as image 3 shown, including the following components:

[0071] The area division module 301 is configured to divide the image into different areas according to the color temperature scene.

[0072] Specifically, the area division module 301 is specifically used for:

[0073] According to the corresponding relationship between the three primary color features of each pixel in the image and the three primary color features of the color temperature scene, determine the color temperature scene to which each pixel in the image belongs;

[0074] According to the color temperature scene to which each pixel in the image belongs, the image is divided into regions corresponding to each color temperature scene.

[0075] Further, the three primary color characteristics of each pixel in the image include: the R / G value and B / G value of each pixel in the image calculated through the existing ...

no. 4 example

[0080] In the fourth embodiment of the present invention, a white balance adjustment device, such as Figure 4 shown, including the following components:

[0081] The area division module 401 is configured to divide the image into different areas according to the color temperature scene.

[0082] Specifically, the area division module 401 includes:

[0083] A pixel calculation unit, configured to use a white balance algorithm to calculate the R / G value and B / G value of each pixel in the image;

[0084] A pixel mapping unit, configured to map each pixel to a different position in a preset coordinate system according to the R / G value and the B / G value of each pixel;

[0085] The abscissa of the preset coordinate system is the R / G value, and the ordinate is the B / G value; the preset coordinate system includes multiple preset color temperature regions;

[0086] A color temperature determining unit, configured to determine the color temperature to which each pixel belongs accord...

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PUM

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Abstract

The invention provides a white balance adjusting method, a device and a mobile terminal. The white balance adjusting method comprises the steps of dividing an image to different areas according to color temperature scenes; respectively calculating the white balance of each area; and performing white balance adjustment on a corresponding area according to the white balance calculating result of each area. When the mobile terminal which uses the white balance adjusting method performs photographing in a hybrid color temperature scene, automatic identification on the color temperature scene in animage is performed, and furthermore area dividing is performed on the image based on the color temperature scene. After a photographing operation is performed, the mobile terminal automatically calculates the white balance result of each area, and furthermore the white balance of each area is adjusted, thereby obtaining a picture with an ideal white balance effect. Furthermore, the mobile terminal can perform white balance smooth transition on the boundary of each area, thereby preventing white balance jumping phenomenon.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a white balance adjustment method, device and mobile terminal. Background technique [0002] With the popularity of smart phones, consumers have more and more opportunities to use smart phones to take pictures, and the quality requirements for photos are also getting higher and higher. There is a common problem in current mobile phone photography: there is an inaccurate white balance calculation problem in photos taken under two or more light sources with large color temperature differences in the FOV (Field of View). Current mobile phones can only adjust the white balance of the entire photo according to one color temperature scene for photos taken in a mixed color temperature scene, or use a variety of color temperature scenes to calculate the white balance. The white balance calculated by these methods can be calculated. Inaccurate question. Contents of the...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N9/04H04N9/73G06T5/00
CPCH04N9/73H04N23/60H04N23/80H04N23/10H04N23/84G06T5/90
Inventor 李恒创
Owner ZTE CORP
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