can automatic detect circle or annulus in a image?

[jenny]

hi, can anyone tell me can labview automatic detect a circle or an annulus in a image without i drag the annulus on the image(using ROI tool). i have few images that have a annulus object at different position, is there any way i can detect automatically detect the annulus object ??

please..... :headbang:

thanks....

[Mike Ashe]

If you are using IMAQ Vision you should save off ROI descriptions in a configuration file then at run time use "IMAQ Convert ROI to Annulus.vi" (I usually make a modified version of this) then feed the annulus clusters into "IMAQ Find Circular Edge".

This works pretty well, at least when grading Tequila limes :beer: :thumbup:

[yazdihr]

Hi;

your question is not clear? Do you want to detect the object automatically or you want to use the ROI automatically? Could you explain a bit more?

Hamid

hi, can anyone tell me can labview automatic detect a circle or an annulus in a image without i drag the annulus on the image(using ROI tool). i have few images that have a annulus object at different position, is there any way i can detect automatically detect the annulus object ??

please..... :headbang:

thanks....

[jenny]

i'm need to automatically detect the object (annulus) in the image/picture. coz i need to extact out the annulus's region out to process...

Michael Ashe, Thanks for the advise. i will try...

yazdihr, thanks...

[Mike Ashe]

Were you able to find the IMAQ Convert ROI to Annulus.vi ? As I said, I usually use a slightly modified version, basically I make the rotation compoment and input rather than use the integers unpacked from the ROI.

Good luck.

[crelf]

I had posted to this thread a few days ago, but it doesn't look like it made it

Are you able to add a sample image for us to look at? It might make it easier for us to provide suggestions...