Test for Existence of Overlay in Image

[DonRoth]

http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Test-for-Existence-of-INDIVIDUAL-overlay-in-Vision-Ima...

[JtotheB]

Kudoed

[GregSands]

The IMAQ Clear Overlays vi should not return an error if the overlay doesn't exist - to me this is a bug.  After all, if no Overlay Groups are wired (so that it clears all overlays) then it doesn't return an error if no overlays are defined.

My solution at this stage is also to Clear Errors, but I put it into the IMAQ Clear Overlay function itself - just means I need to remember to update it when the VDM is upgraded.

[DonRoth]

Agreed.  Same irritation, and same solution for now.....Don

[JtotheB]

I'm meeting with some of the Vision research team later today, I'll bring this up with them and see what they have to say.

[DonRoth]

Tell them the Vision Image Container needs the option to have X and Y scales (with multiplier property nodes) also if you have a chance.

http://forums.ni.com/t5/Machine-Vision/Putting-scales-on-Vision-Images/m-p/1531668

Thanks,

Don