Dual-Controller Camera Tracking for Dead-Zone Position Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing auto-tracking systems using pan-tilt-zoom cameras fail to accurately track objects within the desired position due to the use of dead zones, leading to deviations in the captured image when objects move within these zones, especially with small movements.
Innovation Solution
Implement a control system that combines image capturing direction control through pan-tilt drives with angle of view control using shift units like shift lenses and image sensors, determining the need for pan-tilt drives based on shift amounts rather than dead zones, allowing precise tracking with minimal deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a dead zone is set to prevent PT drive in response to small object movements, then the occurrence of slight changes in angle of view is reduced, but the object tracking position deviates from the desired position
Solution Approach 1:
The control system is segmented into two independent controllers: a first controller that executes PT drive control with dead zone filtering for stability, and a second controller that executes angle of view control without dead zone for precise tracking. This segmentation allows each controller to optimize for its specific function without compromise
Solution Approach 2:
The angle of view control acts as an intermediary mechanism that compensates for the positioning errors introduced by the dead zone in PT drive control. By adjusting the angle of view independently, the system corrects tracking position deviations while maintaining overall stability
2Measurement precision
If PT drive control is executed without dead zone for small movements, then tracking position accuracy is improved, but slight changes in angle of view occur due to small object movements
Solution Approach 1:
The control system is segmented into two independent controllers: a first controller that executes PT drive control with dead zone filtering for stability, and a second controller that executes angle of view control without dead zone for precise tracking. This segmentation allows each controller to optimize for its specific function without compromise
Solution Approach 2:
Different control strategies are applied to different aspects of the tracking system: dead zone filtering is applied locally to PT drive control for stability, while no dead zone is applied to angle of view control for precision. Each control module has optimized local characteristics suited to its specific function
3Measurement precision
If dual controller system is implemented with both PT drive control and angle of view control, then tracking precision is improved, but device complexity increases
Solution Approach 1:
The dual-controller system achieves multi-functionality where the first controller handles coarse positioning through PT drive with dead zone filtering, while the second controller handles fine positioning through angle of view adjustment. Together they provide comprehensive tracking capability that neither controller could achieve alone
Solution Approach 2:
The system replaces a single complex mechanical PT drive system with a combination of simplified PT drive control and electronic angle of view control. This substitution reduces mechanical complexity while maintaining or improving tracking precision through coordinated control of both systems
Data Source
AI summary
A tracking apparatus includes a memory storing instructions, and a processor that implements the instructions as a first controller that executes image capturing direction control by pan drive or tilt drive to capture an object within a predetermined position, and a second controller, different from the first controller, that executes angle of view control by shifting an angle of view of an image capturing apparatus to capture the object within the predetermined position, wherein tracking the object is executed by at least any one of the first controller and the second controller, wherein the first controller determines whether to execute the image capturing direction control by the first controller, based on a shift amount of the angle of view determined based on a moving amount of the object.