Method and related device for determining brightness critical values of image areas

Abstract

The invention provides a method and a related device for determining the brightness critical values of image areas. The method comprises a step of independently performing area brightness critical value generation operation of the image areas, which are formed by dividing an original picture, for a plurality of times, wherein each time of brightness critical value generation operation comprises: generating a total brightness value corresponding to an image area according to a plurality of brightness values of a plurality of pixels in the image area; generating a brightness error value by subtracting a current brightness critical value stored in a temporary storage temporarily from the total brightness value; subjecting the brightness error value to certain filtering processing to generatea post-filtering brightness error value; summarizing all post-filtering brightness error values and generating a summarization result; and updating the current brightness critical value stored in thetemporary storage temporarily according to the summarization result and a brightness approximant. The method and the related device can ensure the change of the total brightness value results from the change of a background model.

Description

technical field [0001] The present invention relates to motion detection (motion detection), in particular to a method for determining a brightness critical value of an image region and related devices, so as to determine the background model of the image region based on the brightness critical value Proceed with mobile detection. Background technique [0002] Motion detection refers to the technology of judging whether the object recorded in the image has moved in the image stream (video stream) and then tracking the moving object. By detecting the correlation between different image frames (video frame) in the image stream, to analyze the dynamics of moving objects in an image stream. This technology has now been widely used in various fields, such as professional sports competitions, security systems, military monitoring and so on. [0003] In the existing motion detection technology, a common method is the background model method, which mainly separates moving objects ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of too much hardware cost required for the establishment of the background model in the existing motion detection, the present invention proposes an innovative method and related device for obtaining the brightness threshold value of the background model, which is achieved through a phase-locked loop The technology, supplemented by the technique of fast approximation, makes the brightness critical value of each region can properly reflect the change of the total brightness value of the image area to generate a brightness critical value that conforms to the current situation, thereby establishing a stable background model

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