Camera movement detection system in monitoring system and method
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A mobile detection and monitoring system technology, which is applied to the components of the TV system, image data processing, TV, etc., can solve problems such as misjudgment and sensitivity to light changes
Inactive Publication Date: 2013-09-11
周渝斌
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Problems solved by technology
Although the method used in this invention is to track the variation range of pixel values in the image to judge whether there is movement, the basis of its detection method is still based on whether the pixel intensity value changes at the same position between two images, but the invention uses The Gaussian statistical model establishes a statistical authority range for each pixel, and changes within a certain range are still regarded as the background. Therefore, although this invention can partially suppress the influence of noise and illumination, it is more sensitive to light changes, especially when the ambient light changes. When it is too fast, such as lightning, changes in sunlight, car lights, street lights, etc., will affect the performance of its algorithm and cause misjudgment
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Embodiment 1
[0075] see figure 2 , the present invention discloses a camera movement detection system in a monitoring system, the system includes an image acquisition module 100, a screen segmentation and feature extraction module 200, a feature point matching module 300, a motion vector filtering module 400, and a background segmentation module connected in sequence 500 . The movement judging module 600 . A reference frame updating module 700 is also provided between the image acquiring module 100 and the feature point matching module 300 . Each module is introduced separately below.
[0076] 【Image Acquisition Module】
[0077] The image acquisition module 100 is used to acquire images collected by cameras in the monitoring system.
[0078] 【Screen segmentation and feature extraction module】
[0079] image 3 It is a flow chart of the work of the screen segmentation and feature extraction module 200, which is used to segment images and extract feature points; including a screen segme...
Embodiment 2
[0138] In this embodiment, the camera movement detection system of the present invention includes:
[0139] The screen segmentation and feature extraction module extracts a representative feature point for each sub-region;
[0140] The feature point matching module finds the corresponding matching feature point for each candidate feature point in the subsequent frame, calculates the motion vector of the feature point, and obtains the motion vector field of the whole picture;
[0141] Filtering module, responsible for filtering out the feature points of the wrong match in the motion vector field;
[0142] The motion update module marks each feature point according to the location of the area, and accumulates the stationary times of the feature point whose motion vector is zero. Once the point has motion, that is, the motion vector is not zero, the cumulative value of the stationary count is immediately cleared.
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Abstract
The invention discloses a camera movement detection system in a monitoring system and a method, and the system comprises an image segmenting module, a feature extracting module, a feather point matching module, a motion vector filtering module, a background segmenting module and a movement judging module, wherein the image segmenting module is used for segmenting images of a reference frame and a subsequent frame; the feature extracting module is used for extracting the features of the images of the reference frame and the subsequent frame; the feature point matching module is used for searching out the matching point corresponding to the candidate feather point in each small area of the subsequent frame from the reference frame; the motion vector filtering module is used for filtering out the feature points which are in mistaken matching in the a motion vector field; the background segmenting module is used for separating out the background images and accumulating the static accumulation times of each small area in the background images; and the movement judging module is used for marking each feature point based on the area positions, accumulating the feature points of which the motion vector is zero, and judging whether a camera moves or not. By the system and method in the invention, the slow movement of a camera in a monitoring system can be detected.
Description
technical field [0001] The invention belongs to the technical field of video monitoring, and relates to a monitoring system, in particular to a camera movement detection system in the monitoring system; meanwhile, the invention also relates to a camera movement detection method in the monitoring system. Background technique [0002] With the continuous increase of the monitoring system network, the number of cameras deployed in the network continues to increase. For example, in the urban traffic monitoring system, the number of monitoring points can range from tens of thousands to hundreds of thousands. There are more and more cameras in the monitoring system, and it is impossible to arrange enough security personnel to check the working status of each camera. Many cameras cannot work normally due to long-term unmaintained, such as interference, virtual focus, occlusion, etc., resulting in the inability to monitor. Checking the working status of the camera in real time requ...
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