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Not Rectangular Image to Image

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   I have an application where I need to extract a portion of an Image, binarize with different threshold the two part of the original image and then merge them back.
To do so, at the moment, I trace a rectangle on the original Image, use two Mask from ROI VI to extract the inside and outside portions of the image and then I use the IMAQ ImagetoImage 2 VI  to merge the two parts.
This procedure works only with rectangular ROI, But I need to do the same with a define by user Polygon.
Any suggestion on How to do it?
In the attached example If you rotate the rectangle you can see my problem. The rotated rectangle seems to become a bigger rectangle. It seems to me that I need something like transparency to solve it....

Thank you so much!



Edited by Gepponline
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