Is there a VI that reports the apparent radius of an image particle, in REAL pixels rather than INTEGER?

We are looking at shapes that are nearly round.
We are trying to calculate their volume.
If we capture the image, and then look at the binary version, and then ask for the equivalent diameter or radius, we get a value in pixels which is integer. This is giving us a course resolution. There should be a way to get this in REAL value. This is almost like the Waddell Disk Diameter that IMAQ's full suite of analyses would give you.
This measurement is repeated quickly, so firing up the IMAQ analyses may not be practical.
Is there a way to get this back in a LabVIEW VI?
THanks
John

Well, if you are mostly interested in the area of the circular particles, couldn't you just get that directly by counting all adjacent pixels within a certain shade range? Assuming circular particles, you can then calculate an effective radius with much higher resolution.
You could probably also detect the particle edges in several directions, then use "fitting on a sphere" on these edge points (If you keep z=0, this algorithm works perfectly for fitting 2D circles in the plane!).
LabVIEW Champion . Do more with less code and in less time .

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Is there a VI that reports the apparent radius of an image particle, in REAL pixels rather than INTEGER?

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