Drawing internal ROI contours interactively

[Vladimir_Drzik]

Hi guys

Let's consider the situation I am drawing a ROI interactively, e.g. in VBAI, IMAQ ConstructROI window or in an image control. I know I can use the Ctrl key to combine (add) multiple ROI contours, generally of different types. Now is it somehow possible to specify an internal contour, i.e. a hole? I know I can do it programmatically, but can I do it interactively?

Vladimir

[BruceAmmons · Accepted solution]

ROIs don't really have an interior/exterior option.  You would have to do it programatically.

The only feature I can think of that might help is an annulus, since that has a hole in the center that you would consider interior.

Bruce

[gregstoll]

Vladimir -

Just to confirm, there's no way to draw internal ROI contours interactively.  If this is something you would find useful, you can submit a product suggestion request at the Product Suggestion Center.

Greg Stoll

Vision R&D

National Instruments

[rpursley8]

And of course if you do it programmatically, you can set it to internal, but when you read it back from the ROI property, it is back to external.  I have my fingers crossed that this bug will be fixed in the next version.

[gregstoll]

Randall -

Just as an FYI, this was reported as CAR #157205 and we are hoping to be able to fix it in the next version.

Greg Stoll

Vision R&D

National Instruments

[rpursley8]

Thanks for the info

[rpursley8]

Any chance of getting access to the contours of an ROI?  Even an index of the active countour would be very useful.  Since a contour highlights when you hover over it and you do have the right-click option to delete a contour, it should be doable.

[gregstoll]

Randall -

Do you mean like getting the index through a property node?

That's an interesting idea - I'd recommend submitting a suggestion for that.

Greg Stoll

Vision R&D

National Instruments

[rpursley8]

I did as you suggested.  I think I have done so before, but I am sure it doesn't hurt to submit it again.