Adaptive PTZ Camera Control for Dead-Zone Object Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing PTZ camera systems struggle with maintaining video quality when tracking objects that move slowly or sway near the target position, often resulting in the object not reaching the target position on time due to low pan, tilt, and zoom speeds, or degrading video quality when increasing speeds.
Innovation Solution
An arithmetic device calculates control speeds for the camera's posture and zoom to adjust the object's position and size relative to a target, switching between first and second control speeds based on predefined thresholds to ensure accurate tracking and improved video quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dead zone control is performed to stop pan, tilt, and zoom operations near the target position, then video quality is improved, but the tracking object either does not reach the target position or reaches it late
Solution Approach 1:
The patent applies dynamics by making the control speed adaptive rather than static. The control speed is dynamically adjusted based on the distance from the target position: when the distance is large, a first control speed is used; when the distance becomes small (entering the dead zone), a second control speed higher than the first is used. This dynamic adjustment resolves the contradiction by allowing the system to respond differently at different stages of the tracking process.
Solution Approach 2:
The patent changes the control speed parameter based on the distance condition. Specifically, it switches between two control speed parameters (first control speed and second control speed) depending on whether the distance is above or below the threshold. This parameter change enables the system to overcome the dead zone effect and ensures the tracking object reaches the target position on time while maintaining video quality.
2Productivity
If pan, tilt, and zoom speeds are increased to make the tracking object reach the target position on time, then tracking timeliness is improved, but video quality degrades
Solution Approach 1:
The patent applies local quality by applying different control speeds for different spatial conditions. Instead of using a uniform high speed throughout, it uses a higher second control speed only when the tracking object is near the target position (within the threshold distance), and a lower first control speed when farther away. This localized adjustment of speed ensures timely arrival without degrading overall video quality.
3Manufacturing precision
If control speed is decreased to maintain video quality near the target position, then video quality is improved, but the tracking object does not reach the target position
Solution Approach 1:
The patent resolves this contradiction through dynamic control speed adjustment. The control speed is not fixed but changes based on the distance condition: when the distance is large, a lower first control speed maintains video quality; when the distance becomes small and the object enters the dead zone, a higher second control speed is applied to ensure the object reaches the target position. This dynamic switching eliminates the problem of the object failing to reach the target.
Data Source
AI summary
Arithmetic devices, methods, and storage mediums are provided herein. At least one device calculates a control speed for controlling a posture of an image capturing device so that a detection position of an object detected from an image captured by the image capturing device becomes closer to a target position of the object in the captured image. In a state where a difference between the detection position and the target position is not smaller than a first threshold, the device calculates a first control speed as the control speed of the posture in accordance with the difference, and in a case where the difference becomes smaller than the first threshold and not smaller than a second threshold smaller than the first threshold after the state, the device calculates, as the control speed of the posture, a second control speed higher than the first control speed in accordance with the difference.