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Extract image using coordinate system

Hello
 
I have a simple question but I could not trace the problem pls suggest me in this. In my application I need to extract a part of image to display  on front panel from the image captured from the camera in which part of image to be displayed  is slightly deviated  every time . I constructed a coordinate system for the reference image and linked to the every new captured  image.  The operational rectangle to extract the image. using IMAQ extract is kept constant but i could not get the required part of image. There is no change in extract image operational rectangle even after the coor dinate system is included. pls find the vi attached.
 
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Hi
Here is a link to a previous post including some code that extracts rotated rectangles from an image. This should do what you want.
Extract Rotated ROIs
Hope that helps
Mike
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