Sub-pixel measure

[Jeff21]

Hello,

im trying to apply a sub-pixel function in my project, but its doesnt works.
i trying to measure  thickness of a circular part.
Anyone has a example (.vi) that use this function to measure some distances, that really works? ( Ex:10,52mm part -> Measure 10,52 or 10,53)

Thanks,

[Filipe Silva]

Hi Jeff21, good  morning.

First we need to know what devices you have to make your measurement ?

Regards,

Filipe Martarello

[Jeff21]

Good Morning Filipe.

My devices:
CVS 1455
Digital Camera - SONY XCD-SX910/X710 (firewire)

Thanks,

Jeff

[Filipe Silva]

Hi Jeff,

First you have to install LabVIEW, LabVIEW Real-Time, Vision Development Module and CVS Driver.

Then ou can see some examples at LabVIEW 'Find Examples'. You can see more about vision at: http://www.ni.com/vision/ .

National Instruments offers a lot of courses including IMAQ. If you want to know more about it, call NI.

Regards,

Filipe Silva

[Jeff21]

Filipe,

I found the error, was the image.
Now i have a perfect image to use the VISION BUILDER tools.
But i would like to know what the best tool for Thickness measure on a circular object like a ring? (Find edges?, 2 Find circular edges and then subtract the values?, ...)

Thanks,

Jeff

[CarlosOtiniano]

is an old post but I see in the forum that this problem is resolved, I've also been working for some time with a high-resolution camera with digital zoom adequate lighting and I can get 1mm menorahs measures nevertheless a margin of error brings , one might solve this?