Image Measurement Device Edge Error Statistical Display
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Solution Overview
Problem
Conventional image measurement devices lack the ability to intuitively display statistical information about edge position errors between workpiece images and design data, making it difficult to identify discrepancies in workpiece contours and pinpoint accuracy issues.
Innovation Solution
An image measurement device with edge extraction, comparison, error calculation, and statistical information display functions that show error statistics along the edges of workpiece images, allowing for intuitive identification of contour disagreements and accuracy issues by displaying statistical information such as average values, variance, and error ratios in a visually clear manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional image measurement devices calculate error values between workpiece images and design data, then measurement precision is improved, but ease of operation deteriorates because statistical information cannot be intuitively identified
Solution Approach 1:
The patent transforms one-dimensional error values into two-dimensional visual representations by displaying statistical information (average values, variance, ratios) along the edge positions of workpiece images. This dimensional transformation allows operators to intuitively grasp measurement results without complex data interpretation.
Solution Approach 2:
The patent creates visual copies of statistical information by overlaying display elements (such as colored markers or graphical indicators) directly onto the workpiece image at corresponding edge positions. This copying approach enables operators to see measurement data in the context of the actual workpiece geometry.
2Measurement precision
If conventional devices display calculated error values, then measurement precision is improved, but device complexity increases due to multiple calculation and display functions
Solution Approach 1:
The patent merges the display of statistical information with the workpiece image itself by overlaying visual indicators directly on the image. This combining approach eliminates the need for separate display interfaces or complex data presentation systems, reducing overall device complexity while maintaining measurement precision.
3Productivity
If conventional devices perform sequential measurement of multiple workpieces, then productivity is improved through batch processing, but loss of time increases due to inability to quickly identify local accuracy issues
Solution Approach 1:
The patent uses color-coded visual indicators to represent different statistical information categories (average error, variance, ratios) at various edge positions. This color differentiation enables operators to rapidly identify areas with accuracy issues during batch processing, significantly reducing the time needed to locate and assess local problems.
Data Source
AI summary
Present invention is an image measurement device capable of easily identifying a degree of disagreement between contours for a plurality of workpieces, and including: an edge extraction unit that extracts an edge line from a workpiece image; an image comparison unit that compares the workpiece image with the previously held master image, an error calculation unit that calculates, based on the comparison result, an error indicating an amount of displacement between an edge position of the workpiece image and a position of the master image corresponding to this edge position; a statistical information calculation unit that calculates statistical information of the calculated error for a plurality of workpiece images and for each edge position; a statistical information display unit that displays the statistical information along the edge line extracted from the workpiece image or the master image in a display mode suitable for the values of the statistical information.