PTZ Camera Rule Positioning During Zoom and Rotation
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Solution Overview
Problem
Intelligent analysis in video surveillance systems with PTZ cameras is hindered when the camera rotates or zooms, as the pre-set intelligent analysis rules fail to maintain their relative position to reference objects, leading to ineffective monitoring.
Innovation Solution
An image processing method that adjusts the intelligent analysis rules relative to reference objects during camera rotations or zoom operations, ensuring the rules' positions remain unchanged by recalculating and re-displaying their coordinates within a two-dimensional coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera is fixed to ensure normal use of the intelligent analysis function, then the intelligent analysis rule can maintain its position relative to the reference object, but the camera cannot perform rotation or zoom operations, leading to wasted resources and reduced surveillance flexibility
Solution Approach 1:
The patent implements dynamic adjustment of intelligent analysis rules by continuously tracking the relative position between the rule and reference object during camera movements. The system calculates real-time coordinate transformations and updates rule positions dynamically, allowing the camera to perform PTZ operations while maintaining analysis functionality.
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring camera movement states and using this information to adjust the intelligent analysis rule positions. The controller receives camera position feedback, calculates the corresponding rule position changes, and applies corrections to maintain proper alignment between rules and reference objects throughout the surveillance area.
2Adaptability or versatility
If the camera rotates or zooms in/out to enhance surveillance coverage, then the camera can monitor different areas, but the pre-set intelligent analysis rule fails to maintain its relative position to the reference object, causing the analysis function to fail
Solution Approach 1:
The system dynamically recalculates the position of intelligent analysis rules based on real-time camera movement parameters. When the camera rotates or zooms, the controller computes the new coordinates of reference objects and adjusts the rule positions accordingly, ensuring continuous functionality of the analysis system across varying surveillance areas.
Solution Approach 2:
The patent extends the coordinate system transformation from simple 2D image coordinates to 3D spatial coordinates that account for camera rotation angles and zoom levels. By incorporating the third dimension of camera orientation and focal length changes, the system can accurately map rule positions across different viewing angles and magnification levels.
Data Source
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AI summary
The present invention relates to the field of video surveillance, and provides an image processing method, so that when a camera with a PTZ function is rotated and/or zooms in/out, a relative position of an intelligent analysis rule relative to a corresponding reference object can remain unchanged. The method includes: receiving an image operation instruction, where the image operation instruction includes performing at least one of a rotation operation or a zoom operation; performing an operation on an image according to the image operation instruction, where the image is overlaid with a rule which is a tripwire or a geometric region and includes a reference object; and displaying the rule on the image on which the operation has been performed, so that a relative position of the rule relative to the reference object remains unchanged before and after the operation.