How do I configure the ROI Descriptor on Find Circular Edge 2?

[another_novice]

Using labVIEW 10 - the Help function offers no help for Find Circular Edge 2 so I'm not sure how to define the ROI.

[ChristopheC]

The Find Circular Edge function expects an Annulus ROI. The ROI structure being a little complex, you can use the helper VIs located in the palette Vision Utilities>>Region of Interest>>Region of Interest Conversion to help you create ROIs.

For Find Circular Edge, look at the conversion VI named IMAQ Convert Annulus to ROI.

Hope this helps,

-Christophe

[another_novice]

Christophe,

That helped a lot. I have it figured out now. The old Find Circular Edge tool just needed the annulus description. Find Circular Edge 2 needs a bounding box ( 4 points: top left and bottom right coordinates) - plus the description of the annulus (6 points: center x, center y, inner radius, outer radius, start angle, end angle.)

It's a pity the Help on this vi is incorrect . Maybe NI could look at that one day.