Video Camera Tracking System Using Calibration Matrix
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Solution Overview
Problem
Existing systems for tracking movable target objects in a local coordinate system are costly, complex, and difficult to set up, limiting their application in dynamic tracking scenarios.
Innovation Solution
A method and system using a video camera with an adjustable aim point axis and a range finder, where a calibration matrix transforms positions from an instrument coordinate system to a local coordinate system, allowing real-time tracking and position calculation of a point of interest on a movable target object by aligning the camera's aim point axis and adjusting pan and tilt angles based on pixel-based images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If costly commercial instrument tracking systems are used, then tracking precision is improved, but system cost increases
Solution Approach 1:
The patent replaces expensive commercial tracking instruments with inexpensive, readily available video cameras and computers. The system uses software-based tracking algorithms rather than costly hardware solutions, making the tracking capability accessible and affordable while maintaining functional precision for the intended applications.
Solution Approach 2:
The patent substitutes mechanical/optical tracking instruments with a video-based system that uses image processing and computer algorithms. Instead of specialized tracking hardware, the system captures video frames and calculates target position through software, replacing complex mechanical systems with electronic and computational components.
2Adaptability or versatility
If complex tracking systems are implemented, then tracking capability is improved, but device complexity increases
Solution Approach 1:
The patent creates a tracking system using standard, multi-functional equipment (video cameras, computers with image processing software) that can be applied to various tracking scenarios. The same basic system architecture handles different target types and applications, eliminating the need for specialized complex instruments for each specific tracking need.
Solution Approach 2:
The system uses the computer's existing processing capabilities and standard video input facilities to perform tracking, rather than requiring dedicated specialized hardware. The software leverages general-purpose computational resources already available in most modern computers, reducing the need for additional complex components.
3Measurement precision
If existing tracking systems are deployed, then position calculation accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent performs coordinate transformation calibration in advance, establishing the relationship between video image coordinates and real-world coordinates before actual tracking begins. This preliminary setup creates lookup tables or transformation matrices that enable accurate position calculation during operation without requiring complex real-time computations, simplifying the user experience.
Data Source
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AI summary
Methods are described for controlling orientation of an aim point axis of a video camera having an instrument coordinate system to track a point of interest on a movable target object and calculating positions of the point of interest in a local coordinate system in which the target object is moving. The methods include measuring pan and tilt angles of the aim point axis and distance substantially along the aim point axis and calculating a calibration matrix which transforms a position defined in the instrument coordinate system to a position defined in the local coordinate system. A system is described including an instrument and at least one computer, wherein the instrument includes a video camera and a range finder, and wherein the video camera includes an aim point axis having an adjustable orientation. In one example, the target object is adapted to move on and inspect an airplane surface.