Problem with Contour Extraction

[pakopon]

Good afternoon, everybody.

 

I'm new here and actually working in a Localization Algorithm using LabView. I tried to extract walls contour from a simple floor plan to use it in my algorithm later. At first I thought doing it manually but then I realized there's a lot of high level VI's in Labview for computer vision. In example, "Extract contour" would give me the coordinates found in an image, so I wrote a simple piece of code to test it. But first, I need to select a ROI. I used "Rectangle to ROI" and added the imputs programmatically, but the Extract Contour VI doesn't accept it as a valid ROI and returns an error. I have absolutely no idea what's going on, because I create the same cluster that the info suggests as a valid input.

 

You can try my attached code to see the problem by yourself using any image.

 

Thanks in advance.

RectangleContour.vi

[ShaunR]

Use "IMAQ Convert Rectangle" instead of "IMAQ Convert Rectangle (Polygon)"

[pakopon]

Thanks a lot!!! I thought that was for rectangles without orientation. But it accepts also an orientation parameter.