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A kind of image adaptive wide dynamic mode adjustment method

An adjustment method and wide dynamic technology, applied in the field of image processing, can solve the problems of limited gain judgment, image overexposure, etc., and achieve the effect of improving the dynamic range

Active Publication Date: 2022-07-01
HANGZHOU NATCHIP SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method is limited to the judgment of the gain. Since multiple frames are required to be fused in the wide dynamic mode, in the judgment of the gain, the gain may change and the image mode may be adjusted, resulting in over-exposure or under-exposure of the image.

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  • A kind of image adaptive wide dynamic mode adjustment method
  • A kind of image adaptive wide dynamic mode adjustment method
  • A kind of image adaptive wide dynamic mode adjustment method

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Embodiment Construction

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments are exemplary and are only used to explain the present invention and cannot be regarded as a limitation of the present invention.

[0028] like figure 1 , an image adaptive wide dynamic mode adjustment method, which firstly performs histogram statistics, then performs data analysis, and finally performs mode adjustment.

[0029] First, perform brightness statistics on the brightness domain of the collected images, the specific method is as follows:

[0030] Extract the brightness domain of the image to obtain the brightness domain image; count the number of pixel values ​​of the brightness domain image, and count K=2 p A gray level is obtained, and the K-segment histogram statistics set G[k] is obtained, k=0,1,2,...,(K-1), p∈[8,10,12]. In this embodiment, p=8 is used, a total of 256 gray levels are counted, and the number...

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Abstract

The invention discloses an image adaptive wide dynamic mode adjustment method. The existing method adopts traditional fixed adjustment, which is not adaptable to the scene. The method of the invention firstly obtains the histogram interval by performing brightness statistics on the image brightness domain to be analyzed, and then performs scene analysis on the histogram data to obtain various adjustment coefficients for scene judgment; finally, according to each adjustment coefficient twice Judgment can effectively ensure the robustness of the algorithm. The method of the invention can effectively analyze the complexity of the current scene, identify the required dynamic range of the current scene, and control the camera to switch modes between wide dynamic and non-wide dynamic.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image adaptive wide dynamic mode adjustment method. Background technique [0002] Due to the relatively fixed installation position of surveillance cameras, it is inevitable to encounter the problem of strong light. Excessive light will cause the image to lose effective information. Solving or dealing with strong light is an unavoidable problem. At present, in the process of image acquisition, the camera improves the dynamic range of the image by adjusting the exposure, dynamic range, and wide dynamic mode of the camera. [0003] The traditional WDR adjustment method is as follows: First, the mode switching between WDR and non-WDR is performed according to a fixed time setting. Since the target scene will change according to changing factors such as seasons and weather, this method cannot be adjusted according to the actual situation, thereby affecting th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/136
CPCG06T5/008G06T7/136G06T2207/30168
Inventor 陈凯黄俊斌黄磊
Owner HANGZHOU NATCHIP SCI & TECH