[Vision] Measuring the minimum and maximum radius of a particle

Hi all,
I'm currently developing an upgraded vision application that includes a particle sizing measurement using the IMAQ Particle Analysis VI.
Currently I'm using the Equivalent Ellipse Major and Minor axes, which works fairly well but appears to overstate the area of the particles compared to the previous implementation of the software for this system. The original software used a maximum and minium radius measurement using the actual perimiter of the particle rather than an equivalent ellipse.
I'm looking at using Max Feret Diameter and Equivalent Ellipse Minor (Feret) instead, and I was wondering if anyone has any experience with this sort of measurement and can offer some advice? I'm processing up to 100 particles per frame at around 7-8 fps, so I don't know if writing my own LabVIEW code to perform the measurement will be fast enough.
Cheers
Brett Percy
Senior Software Development Engineer
Certified LabVIEW Architect and LabVIEW Champion

Hi Bjorn,
I can detect the particles fine, the issue is with the particle size measurement. As you can see from the image, most of the particles are not very round. The previous version of the software caclulated a maxium and minimum radius of the particle, but there doesn't seem to be an exact equivalent in the LabVIEW vision library
Cheers
Brett
Senior Software Development Engineer
Certified LabVIEW Architect and LabVIEW Champion
Attachments:
6.png ‏1325 KB

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[Vision] Measuring the minimum and maximum radius of a particle

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