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National Instruments Vision Libraries
Analyzes Filter Fibers
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TESTniques Inc., Minneapolis MN, has
developed an automated fiber diameter measurement program for Donaldson Company
Inc., Minneapolis, MN.
This program uses National Instruments Vision Libraries for Measurement Studio
to provide automated measurement of fiber diameters from scanning electron
microscope images. As diameters are measured, readings are grouped according to
sizes and plotted in histogram format. Resulting data is stored in a table and
is available for report print out
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Operator interface screen showing
histogram and analysis results table
To use the program the technician selects an image file, calibrates the
measurement, selects a region of interest, and clicks the Analyze button. The
program determines the optimal contrast ratio, creates a high contrast
black/white image, and creates a list of object contours.
As the list of contours is created a specially designed algorithm takes over to
measures cross-fiber diameters. The user has the option to view measurement
animation in real time to verify integrity of measurement
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Filter media image from scanning
Electron microscope |
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Image after setting optimal contrast,
creating outline contours, and cross-fiber segments |
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Program is in use by Donaldson
manufacturing and research departments in the US and UK. The program provides
consistent automated measurements resulting in higher productivity and greater
measurement accuracy. |
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