Fast calibration method for intelligent video surveillance
A technology of intelligent video monitoring and calibration method, which is applied in image data processing, instrumentation, calculation, etc., and can solve problems such as low efficiency
Inactive Publication Date: 2014-05-07
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to overcome the defect that the existing calibration method is not efficient in intelligent video surveillance technology, the present invention provides a fast camera calibration method applied to intelligent video surveillance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] 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 specific 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.
[0017] Such as Figure 1-Figure 3 A fast calibration method for intelligent video surveillance shown mainly includes:
[0018] Step 1: Vertically set a pole with a height of LA on the ground to form three reference lines in the video image. Here, one pole can be repeatedly set to form, or three poles of the same size can be used to form at one time, as shown in figure 2 three thicker short solid lines;
[0019] Step 2: Extend and intersect the three reference lines in the video image at one point to obtain the position of the camera projection point M;
[0020] Step 3: Extend the verte...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fast calibration method for intelligent video surveillance. Firstly, a marker post is vertically arranged on the ground to enable the marker post to form three reference lines in a video image. Secondly, the three reference lines in the video image extend to be connected at a point so that the position of the subpoint M of a camera can be obtained. Thirdly, the connection line of the top points of any two reference lines and the connection line of the bottom points of any two reference lines extend to form an intersection point, and vanishing lines of the reference lines are formed through any two intersection points. Fourthly, the height of the camera is calculated based on the variable ratio invariance principle of a collinear point in affine transformation. Lastly, the relation between the height of a target in an image pixel coordinate system and the height of a target in a world coordinate system is obtained through the geometrical relationship. The fast calibration method has the obvious advantages that the relation between the world coordinate system and the image pixel coordinate system is directly obtained by forming the reference lines and the vanishing lines through one simple marker post, the calculation steps of the method are simple and easy to carry out, and the efficiency of intelligent video surveillance is greatly improved.
Description
technical field [0001] The invention relates to a calibration technology in intelligent video surveillance, specifically, a fast calibration method for intelligent video surveillance. Background technique [0002] With the rapid development of computer vision technology and information processing technology, intelligent video surveillance has gradually become one of the supporting technologies for security protection, and is widely used in public security, transportation, banking and other important departments. However, the premise of realizing intelligent monitoring is that the computer monitoring system can correctly understand the corresponding relationship between the two-dimensional video frame image and the three-dimensional real scene. It is not easy to manufacture, and it is necessary to accurately capture the feature points indicated by the calibration reference object, making it difficult for traditional calibration methods to be widely used in intelligent video s...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G06T7/00
Inventor 李作进陈刘奎
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY