Blurring Detection in Stereo Measurement Endoscope
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Solution Overview
Problem
Existing industrial endoscope devices face challenges in accurately measuring the shape and distance of subjects due to movement-induced errors and blurring, which affect the reliability of stereo measurement results.
Innovation Solution
A measurement device with an imaging unit capturing first and second images from different optical paths, a controller for optical path setting and blurring determination, and a measurement unit for calculating shape and distance based on these images, ensuring no blurring occurs before performing measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stereo measurement is performed using pictures captured from two different optical paths, then measurement function is provided, but measurement precision deteriorates due to movement-induced errors and blurring
Solution Approach 1:
The system performs preliminary blurring determination by capturing multiple pictures through the same optical path before switching to measure if blurring occurs. This preliminary action allows the system to detect movement-induced blurring before it affects measurement accuracy, enabling the controller to decide whether to proceed with stereo measurement or adjust the optical path switching timing.
Solution Approach 2:
The system implements feedback by determining blurring based on the amount of movement between consecutive pictures captured through the same optical path. The controller uses this blurring information to feedback control the optical path switching timing, ensuring measurement is performed only when blurring is within acceptable thresholds, thereby maintaining measurement precision.
2Ease of operation
If optical path switching is performed between capturing first and second pictures, then stereo measurement is enabled, but measurement precision deteriorates due to blurring caused by device movement
Solution Approach 1:
The system captures multiple pictures through the same optical path before switching to establish a baseline for blurring determination. This preliminary picture capture allows the system to calculate movement amounts and determine blurring conditions before the actual measurement pictures are captured, ensuring optical path switching occurs only when necessary and does not introduce blurring.
Solution Approach 2:
The controller continuously monitors the amount of movement between consecutive pictures and determines blurring based on this feedback. When blurring exceeds a predetermined threshold, the controller adjusts the optical path switching timing or prevents switching, thereby maintaining measurement precision while still enabling the measurement function.
3Measurement precision
If multiple pictures are captured through the same optical path for blurring determination, then blurring detection is improved, but device complexity increases
Solution Approach 1:
The system captures a limited number of pictures (more than one but not excessively many) through the same optical path for blurring determination. This partial action provides sufficient data to calculate movement amounts and detect blurring while avoiding the complexity of capturing too many pictures. The controller processes only the necessary minimum number of pictures to achieve accurate blurring detection.
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
The solution enhances the accuracy of shape and distance measurements by suppressing errors caused by blurring and movement, leading to more reliable measurement results.
Implementation Method 1
an imaging area on which a first image of a subject formed by light transmitted through a first optical path and a second image of the subject formed by light transmitted through a second optical path different from the first optical path are commonly formed
Implementation Method 2
the measurement endoscope device calculates three-dimensional coordinates of a subject and a size of the subject on the basis of the principle of stereo measurement using the two generated pictures
Data Source
AI summary
In a measurement device, a controller causes an imaging unit to generate a plurality of first pictures based on a first image and a plurality of second pictures based on a second image. The controller determines whether or not there is blurring on the basis of at least two of the plurality of first pictures. The controller determines whether or not there is blurring on the basis of at least two of the plurality of second pictures. The controller causes a measurement unit to perform measurement when the controller determines that there is no blurring in first picture blurring determination and second picture blurring determination.