Pan-Tilt Camera Shake Correction at Mechanical Limits
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Solution Overview
Problem
Network cameras equipped with pan/tilt mechanisms face challenges in performing image blur correction when located at the mechanical driving ends, as the required driving range for correction cannot be achieved, leading to suboptimal image quality.
Innovation Solution
An imaging apparatus with a pan/tilt driving unit that includes a processor and memory for detecting shake, calculating the necessary driving range, and determining the required panning or tilting driver range to correct image blur, even when the camera is at the mechanical driving end, by integrating angular velocity data and considering additional image blur correction methods like electronic and optical corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PT image blur correction is used by a network camera located at the end point of panning or tilting directions, then the camera cannot perform the required driving for image blur correction, but the need for image blur correction remains
Solution Approach 1:
The system dynamically adjusts the driving range of the pan-tilt mechanism based on the current position and shake detection. When the camera is near the mechanical end point, the system modifies the correction strategy by using electronic image blur correction instead of relying solely on mechanical PT movement, thus adapting the correction method to the available driving range
Solution Approach 2:
The patent replaces mechanical PT-based image blur correction with electronic image blur correction when the camera is located at the end point of panning or tilting directions. This substitution allows image blur correction to function effectively without requiring mechanical movement beyond the available driving range
2Manufacturing precision
If the camera is positioned at the mechanical driving end, then the pan/tilt mechanism cannot rotate beyond the end point, but image blur correction requires additional driving range
Solution Approach 1:
The patent segments the image blur correction function into two parts: mechanical PT-based correction and electronic correction. When the camera is within the normal driving range, PT correction is used; when at the end point, electronic correction is used. This segmentation allows the system to maintain correction precision across the entire operating range
Solution Approach 2:
The system changes the correction parameter from mechanical driving amount to electronic image processing parameters when the camera is at the end point. The determination unit calculates the required driving range and switches to electronic correction when mechanical driving range is insufficient, thereby maintaining correction effectiveness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective image blur correction across the pan/tilt driving range, ensuring clear images are provided to users by determining and adjusting the driving range within mechanical limits, thereby overcoming the limitations of traditional PT image blur correction.
Implementation Method 1
a shake detection unit configured to detect shake
Data Source
AI summary
An imaging apparatus comprises a first correcting unit configured to correct image blur by driving at least one of a panning driver that rotates an imaging unit including an imaging optical system and an image sensor in the horizontal direction, and a tilting driver that rotates the imaging unit in the vertical direction; a shake detection unit configured to detect shake; a calculation unit configured to calculate an amount of image blur correction in accordance with the shake detected by the shake detection unit; and a determination unit configured to determine a driving range required by the panning driver or the tilting driver in order to correct an image blur, in accordance with the amount of image blur correction and a mechanical driving end of the panning driver or the tilting driver.