Video surveillance method and device
A technology of video surveillance and video image, applied in the field of surveillance, can solve the problem of misjudgment of camera perspective effect events and other issues
Active Publication Date: 2021-03-23
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem of event misjudgment due to the perspective effect of the camera
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[0035] The technical solutions of the present invention will be further described in detail below by accoverts and examples.
[0036] The flow chart of one embodiment of the video surveillance method of the present invention is figure 1 Indicated.
[0037] In step 101, a planar video image of a plurality of different shootings is acquired. Using multiple 2D cameras to monitor the same area from different shooting positions to get a flat video image captured from different locations. In one embodiment, two 2D imaging mechanisms are used as a two-purpose stereo vision system.
[0038] In step 102, the plurality of planar video images acquired in the previous step are reconstructed, and the 3D video image is acquired.
[0039] In step 103, the three-dimensional coordinate information of the target is acquired according to the 3D video image. The target can be an object located within the monitoring area, the location, or a pixel point or a pixel point or a population of color inform...
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The invention provides a video monitoring method and device, which relate to the monitoring field. Wherein, a video monitoring method of the present invention includes: obtaining a plurality of planar video images at different shooting positions; performing 3D reconstruction on the plurality of planar video images to obtain a 3D video image; obtaining three-dimensional coordinate information of a target according to the 3D video image; The event occurrence is extracted based on the positional relationship between the target and the virtual door, wherein the virtual door includes three-dimensional coordinate information. Through such a method, the plane video images of multiple shooting positions are three-dimensionally reconstructed to obtain a 3D video image, the three-dimensional coordinate information of the target is obtained from the 3D video image, and the positional relationship between the virtual door and the target is judged based on the three-dimensional coordinate information of the target, thereby The occurrence of events is extracted, which effectively avoids misjudgment of events caused by perspective effects in two-dimensional images, and improves the accuracy of event judgment.
Description
Technical field [0001] The present invention relates to the field of monitoring, particularly a video surveillance method and apparatus. Background technique [0002] The intelligent video behavior analysis system has a high application value in various monitoring places, and its basic general method is to use the background image to detect moving targets by the background image and the current frame of the current frame, follow-up , Classification and behavior analysis, or the use of training recognition directly detect the specified type target from the video, track and analyze the detected targets, and perform an early warning judgment to achieve intelligent monitoring. [0003] In behavioral analysis, tumbling line detection and regional intrusion detection is the basic detection function. It is basically realized to: set at least one line segment or one area in the video image, detecting whether the moving target in the video occurs across the line segment or enters / leaves...
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IPC IPC(8): G06K9/00H04N7/18
CPCH04N7/181G06V20/42G06V20/44
Inventor 程淼潘华东潘石柱张兴明
Owner ZHEJIANG DAHUA TECH CO LTD