Drawing ROI on video frame

Hi all, I am currently working a project on vehicle detection. The problem I encounter is that when I draw the ROI on the video frame using impoly and obtain the coordinates of the polygon using getPosition. However, when i try to show it with shapeinserter, it says the point input must be M by 2L matrix. but isn't that the type of matrix from getPosition is also n by 2?

Answer 1

[Image Analyst]

Try just putting it up with plot(). I do it all the time over a live image and it works fine.