Method and device for adjusting image brightness

A technology of image brightness and adjustment method, which is applied in the field of image processing, can solve problems such as color cast of fusion images, and achieve the effect of solving color cast

Active Publication Date: 2017-02-15
CHENGDU CK TECH
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and device for adjusting image brightness. By adjusting the brightness of a

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  • Method and device for adjusting image brightness
  • Method and device for adjusting image brightness

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Embodiment Construction

[0047] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0048] Such as figure 1 As shown, an image brightness adjustment method includes the following steps:

[0049] Step 1: Obtain black and white and color images in the same scene through black and white and color cameras.

[0050] Step 2: Determine whether the color image is overexposed: if the color image is not overexposed, perform region segmentation on the black and white image; otherwise, return to the color image and prompt that the fusion fails.

[0051] The segment algorithm and other algorithms that can achieve the same function are used when the black and white image is segmented.

[0052] Such as figure 2 As shown, the method for determining whether the color image is overexposed is:

[0053] Converting the color image into a YUV format to obtain a first...

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Abstract

The invention discloses a method and device for adjusting the brightness of an image. The method comprises: a black-and-white image and a color image in the same scene are obtained by using a black-and-white camera and a color camera; whether the color image is exposed excessively is determined; if not, region segmentation is carried out on the black-and-white image; the black-and-white image is processed by normalization and regions, obtained by region segmentation, of the black-and-white image are merged into a plurality of regional layers; the regional layers are divided into a bright region and a dark region; a sum of brightness differences between all regional layers in the dark region and corresponding regions in the color image is calculated to obtain a dark region brightness difference value, a sum of brightness differences between all regional layers in the bright region and corresponding regions in the color image is calculated to obtain a bright region brightness difference value; according to the dark region brightness difference value and the dark region brightness difference value, the brightness of the black-and-white image is adjusted; and the black-and-white image after brightness adjustment is fused with the color image. According to the invention, with brightness adjustment of the black-and-white image, a problem of color deviation of the fused image is solved.

Description

Technical field [0001] The present invention relates to the technical field of image processing, in particular to an image brightness adjustment method and device. Background technique [0002] With the rapid development of mobile phone camera functions in recent years, consumer demand for cameras with more powerful functions has gradually increased. Night scene is a commonly used shooting scene for users, and its effect is optimized, which can effectively improve the user experience of taking pictures of the camera. At present, the common night scene photographing method in the industry is: use a color camera (RGB) and a black and white camera (MONO) to take pictures separately, and enhance the night scene effect by fusing the images taken by the two cameras. [0003] When taking pictures, the brightness, detail, and noise of the black and white camera will be better than that of the color camera. Therefore, in the fusion process, the color camera is used to provide color, and th...

Claims

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Application Information

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IPC IPC(8): H04N9/09H04N9/77H04N5/265
CPCH04N5/265H04N9/77H04N23/13
Inventor 王涛
Owner CHENGDU CK TECH
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