Intelligent enhancement method based on historical frame image mean statistics
A frame image and historical frame technology, applied in the field of intelligent enhancement based on the average value statistics of historical frame images, can solve the problems of manual adjustment, time-consuming and laborious, unable to meet the complex and changeable actual application environment, etc., and achieve the effect of soft image
Active Publication Date: 2016-06-01
CHENGDU GUOYI ELECTRONICS TECH CO LTD
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Problems solved by technology
[0002] In the field of security, most cameras have integrated enhancement algorithms such as adjustable brightness and contrast. However, these functions need to be adjusted manually, which cannot meet the complex and changeable actual application environment.
Especially in the case of many cameras, manually adjusting each camera is time-consuming and laborious
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[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0034] Such as figure 1 As shown, an intelligent enhancement method based on historical frame image mean statistics includes the following steps:
[0035] S1: Capture each frame of image in the input video stream;
[0036] S2: Calculate the mean value of each frame image;
[0037] The average image value of each frame is calculated on the current frame. When the first frame of the video stream is captured, the image average value of the first frame is calculated and the flag is initialized. The initialization method is as follows:
[0038] (1) When the average value of the first frame image is less than the first threshold X1, then flag=0;
[0039] (2) When the average value of the first frame image is greater than the second threshold X...
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The invention discloses an intelligent enhancement method based on historical frame image mean statistics. The method comprises steps: each frame of image in an input video stream is captured; the mean of each frame of image is calculated; when the flag of a previous frame is 0, statistics on whether means of continuous N frames of images are all smaller than a first threshold X1 is carried out, if requirements are met, adaptive gamma enhancement processing is carried out, or otherwise, a result is outputted directly; and when the flag of the previous frame is detected to be 1, statistics on whether means of continuous N frames of images are all larger than a second threshold X2 is carried out, if requirements are met, enhancement processing is quitted and the result is outputted directly, or otherwise, enhancement processing is continued to be carried out. Through actual measurement, at night and other low-illumination environment, the enhancement function can be started adaptively through an algorithm; the enhancement function is closed automatically in a strong light condition; and many low-illumination enhancement algorithms can be automatically started and closed through the intelligent mode.
Description
technical field [0001] The invention relates to a video enhancement algorithm, in particular to an intelligent enhancement method based on statistics of historical frame image mean values. Background technique [0002] In the field of security, most cameras have integrated enhancement algorithms such as adjustable brightness and contrast. However, these functions need to be adjusted manually, which cannot meet the complex and changeable actual application environment. Especially in the case of a large number of cameras, it is time-consuming and laborious to manually adjust each camera. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide an intelligent enhancement method for statistically analyzing the average value of the historical frame images of the video and analyzing whether the next frame needs to be enhanced. [0004] The purpose of the present invention is achieved by the following t...
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IPC IPC(8): G06T5/00
CPCG06T2207/10016G06T2207/10024G06T5/00
Inventor 刘军
Owner CHENGDU GUOYI ELECTRONICS TECH CO LTD