Stereo Measuring Device for Image Defect and Calibration Checks
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Solution Overview
Problem
Existing stereo endoscopic and exoscopic systems face challenges in maintaining accurate calibration and detecting defects that lead to measurement inaccuracies due to factors like soiling, mechanical impact, and external disturbances, necessitating frequent recalibration by expert personnel, which is time-consuming and impractical for users.
Innovation Solution
A measuring system and method that continuously checks the state of captured images and calibration quality using stereo reconstruction, alerting users to defects or calibration issues, allowing for automatic recalibration recommendations and function restrictions to maintain measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stereo reconstruction is used to enable depth measurements, then measurement precision is improved, but reliability deteriorates due to calibration quality issues and capturing defects
Solution Approach 1:
The evaluation apparatus continuously monitors calibration quality and capturing defects in real-time, providing feedback to the output apparatus to alert users. This feedback mechanism detects calibration drift and lens soiling, allowing the system to maintain measurement precision and reliability by warning users when quality thresholds are exceeded
Solution Approach 2:
The system performs preliminary calibration quality checks and capturing defect detections before measurements are taken. By assessing calibration quality and lens condition in advance, the system prevents measurements from being performed when reliability would be compromised, thus maintaining measurement precision
2Measurement precision
If frequent recalibration is performed to maintain calibration quality, then measurement precision is improved, but loss of time increases due to expert personnel requirements
Solution Approach 1:
The evaluation apparatus continuously monitors calibration quality and provides real-time feedback to users. Instead of requiring frequent manual recalibration by experts, the system alerts users when calibration quality deteriorates, allowing recalibration to be performed only when necessary and at convenient times, thus maintaining measurement precision while minimizing time loss
Solution Approach 2:
The system performs self-monitoring of calibration quality and capturing defects through the evaluation apparatus. This automated monitoring eliminates the need for frequent expert intervention, as the system serves itself by detecting when recalibration is needed and notifying users, thereby maintaining calibration accuracy without significant time loss
3Ease of operation
If lens soiling is allowed to accumulate, then ease of operation is improved, but measurement precision deteriorates due to capturing defects
Solution Approach 1:
The evaluation apparatus continuously monitors for capturing defects including lens soiling and provides real-time feedback to users. This allows the system to operate continuously with ease while maintaining measurement precision, as users are alerted when lens soiling begins to degrade image quality and depth measurement accuracy
Solution Approach 2:
The system enables continuous operation by automatically monitoring for lens soiling and other capturing defects. The evaluation apparatus ensures that useful measurement actions continue uninterrupted by alerting users only when quality thresholds are exceeded, thus maintaining both ease of operation and measurement precision
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
Ensures continuous, real-time monitoring of image quality and calibration, reducing measurement errors by providing alerts and enabling automatic recalibration, thus enhancing the precision and reliability of stereo measurements.
Implementation Method 1
two image capture units, preferably synchronized per time unit and viewing angle, each capture one image of the scene to be observed. This results in each case in so-called stereo measured image pairs with a common time stamp. Depth information can be evaluated from such a stereo measured image pair using methods of stereo reconstruction.
Data Source
AI summary
A measuring system for checking a measured-image state and/or a calibration quality for a stereo measured image, comprising: a first image capturing apparatus; a second image capturing apparatus spaced apart from the first image capturing apparatus; an output apparatus; and an evaluation apparatus designed to generate a stereo measured image from the at least first measured image and the at least second measured image by way of stereo reconstruction; wherein the evaluation apparatus is designed to check a measured-image state and/or to check the calibration quality of the stereo measured image and, should the at least one capturing defect overshoot or undershoot a predetermined threshold value, to transmit a first alert to the output device, and/or, should the calibration quality overshoot or undershoot a predetermined quality limit value, to transmit a second alert to the output device.