Two-dimensional modeling and GIS (Geographic Information System) projection method for CCTV (Closed Circuit Television) video target
A GIS map and target technology, applied in the field of intelligent video surveillance system and geographic information system
Inactive Publication Date: 2017-11-10
深圳市置辰海信科技有限公司
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[0005] However, the location information that is not included in the target information identified by the above-mentioned intelligent video analysis system, how to calculate the video target location information and directly project it on the GIS map is a problem that needs to be solved at present
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] see figure 1 As shown, the present invention utilizes the direct origin of projective geometry and perspective method to insert an upright glass plate between the eyes and the scene, and assume that light rays are emitted from the eyes to every point of the scene. These lines are called projection lines . Imagine that each line intersects the glass plate at a point, and the collection of these points is called a cut. Such as figure 1 As shown, when the eye observes the rectangle ABCD on the horizontal plane at O, the connection lines from O to the points of the rectangle form a projection...
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The invention discloses a two-dimensional modeling and GIS (Geographic Information System) projection method for a CCTV (Closed Circuit Television) video target. The method comprises the following steps that: through one point, carrying out transmission on a plurality of surfaces to realize one projection of a practical plane on a picture, calculating the coordinate of the target on the screen according to a projection geometry principle, and then, obtaining a GIS map coordinate through coordinate system conversion. By use of the method, a video image is abstracted into a two-dimensional image, an image outline identified in the abstracted two-dimensional image is analyzed through an intelligent video and is subjected to target identification, the position coordinate of the target is calculated, and the identified position coordinate of the target is subjected to longitude and latitude conversion to obtain a target GIS map longitude and latitude, the target GIS map longitude and latitude is projected to a GIS system, and a video image which contains geographic position information is generated.
Description
technical field [0001] The invention belongs to the technical field of intelligent video surveillance systems and methods, and in particular relates to a method for combining an intelligent video surveillance system with a geographic information system. Background technique [0002] Intelligent video surveillance system and geographic information system have been widely used in security monitoring in various areas, which are to identify, track, and analyze the target objects in the video screen, so as to filter out some useless information and obtain useful information. information. [0003] The geographic information system (GIS for short) is also gradually being applied in various fields such as airports, docks, water transportation, and land transportation, especially in regional monitoring systems such as ports and docks. GIS, automatic ship identification system (AIS for short) and radar monitoring system The combined use can instantly display the position information ...
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Login to View More IPC IPC(8): G06T7/70G06F17/30H04N7/18
CPCG06T7/70G06F16/29H04N7/18
Inventor 冯祥成吕共欣谭明赵国明
Owner 深圳市置辰海信科技有限公司