Shape Measuring Device Region of Interest Control
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Solution Overview
Problem
Existing shape measuring devices face challenges in appropriately setting the measurement target region due to variations in the moving direction and distance of the pattern on the object, influenced by the object's shape, relative movement direction, and positions of the projection and image capturing units.
Innovation Solution
A shape measuring device with a projection unit, image capturing unit, movement unit, and region-of-interest setting unit that allows for relative movement of the pattern on the object and sets a region of interest for accurate measurement based on the projected pattern's position, enabling precise extraction and measurement of the object's shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measurement target region is moved following movement of the reference surface based on level-difference boundary line movement, then the measurement can be performed, but the measurement target region cannot be appropriately set in some cases due to varying moving direction and distance of the pattern
Solution Approach 1:
The system detects the actual movement of the pattern image on the measurement target and uses this feedback information to dynamically adjust the measurement target region position. The region-of-interest setting unit receives detection results about pattern movement and automatically updates the measurement region to follow the pattern, ensuring accurate measurement regardless of the object's shape or movement characteristics.
Solution Approach 2:
The measurement target region is made dynamic rather than fixed. The region-of-interest setting unit continuously adjusts the measurement region position based on real-time detection of pattern movement. This dynamic adjustment allows the system to adapt to varying moving directions and distances of the pattern, resolving the contradiction between measurement precision and adaptability.
2Productivity
If the pattern and object to be measured are relatively moved to measure different regions, then more comprehensive measurement is achieved, but the moving direction and distance vary with object shape and relative positions making it difficult to control
Solution Approach 1:
The system performs self-adjustment through automatic region-of-interest setting. The region-of-interest setting unit autonomously detects pattern movement and adjusts the measurement region without requiring complex external control. This self-service mechanism simplifies the overall control system while enabling comprehensive measurement of different object regions through automated pattern movement and region adjustment.
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 allows for more accurate extraction and measurement of the object's shape by appropriately setting the measurement target region, improving measurement conditions and reducing false recognition of multiple reflection images.
Implementation Method 1
a projection unit configured to project a pattern onto a measurement target
Implementation Method 2
an image capturing unit configured to capture a picture image of a measurement target onto which the pattern is projected
Data Source
AI summary
An object is to measure the shape of an object to be measured under a more appropriate condition. A shape measuring device includes a projection unit configured to project a pattern onto a measurement target by light, an image capturing unit configured to capture a picture image of the measurement target onto which the pattern is projected by the projection unit, a movement unit capable of moving a projected position of the pattern on the measurement target by relatively moving the projection unit and the measurement target, and a region-of-interest setting unit configured to set a region of interest for acquiring information used to measure the measurement target to be in at least part of a region captured by the image capturing unit, so as to include an image of the pattern.