PTZ Camera Imaging Ratio Calculation for Subject Tracking
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Solution Overview
Problem
Existing image processing systems using PTZ cameras struggle to reliably generate follow-up video data with high image quality due to mechanical delays in pan, tilt, and zoom operations, especially when the subject moves quickly, leading to potential loss of the subject and image degradation.
Innovation Solution
An image processing apparatus and method that calculates an optimal imaging ratio to adjust the PTZ camera's zoom parameters dynamically based on the subject's speed, acceleration, and communication delays, ensuring the subject remains within the capture range while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed camera with a large angle of view is used to capture the notable subject, then the subject is less likely to move out of the capturing range, but the image quality of the clipping image is degraded
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed camera to a dynamic PTZ camera system that can adjust its capturing parameters in real-time. The camera performs pan, tilt, and zoom operations to dynamically track the notable subject while maintaining optimal image quality through continuous parameter adjustment based on subject position and movement.
Solution Approach 2:
The patent implements parameter changes by adjusting the PTZ camera's capturing parameters (pan angle, tilt angle, zoom level) based on the detected position and movement of the notable subject. The system calculates optimal parameter combinations to maintain both subject capture reliability and image quality, changing parameters dynamically rather than using a fixed configuration.
2Manufacturing precision
If a PTZ camera is used to maintain image quality through pan, tilt, and zoom processing, then the image quality is improved, but a predetermined drive time is required for mechanical operations
Solution Approach 1:
The patent applies preliminary action by predicting the future position of the notable subject based on current movement trends and preemptively adjusting the PTZ camera parameters before the subject moves out of the optimal capturing range. This reduces the reactive drive time and prevents subject loss.
Solution Approach 2:
The patent implements feedback by continuously monitoring the notable subject's position and movement, comparing it with the current camera capturing parameters, and automatically adjusting parameters to maintain optimal tracking. The system uses real-time feedback loops to minimize mechanical drive time while maintaining image quality.
3Stability of the object's composition
If the camera capturing direction is adjusted slowly due to mechanical drive time, then the camera operation is stable, but the notable subject may be lost when the subject moves quickly
Solution Approach 1:
The patent applies dynamics by implementing variable speed adjustment of the PTZ camera parameters. The system adjusts the rate of parameter change based on the notable subject's movement speed and direction, allowing faster response when the subject moves quickly while maintaining stability during normal conditions. This dynamic adjustment resolves the contradiction between stability and responsiveness.
Data Source
AI summary
Provided are an apparatus and a method for calculating an imaging ratio for clipping image generation that is an index value for more reliably executing clipping image generation processing including a notable subject from a captured image of a PTZ camera. In a configuration in which an image clipping region including the notable subject is calculated from the captured image of the PTZ camera, and the image of the calculated region is clipped to generate the clipping image, the imaging ratio for clipping image generation that is a size ratio of the imaging region of the camera to the clipping image is calculated as an index value for executing the clipping image generation processing including the notable subject. Furthermore, a zoom parameter for capturing an image according to the imaging region size of the camera calculated from the imaging ratio for clipping image generation is calculated, and the PTZ camera is caused to execute image capturing to which the calculated parameter is applied.