extract the overlay portion of an image

[greg83]

First of all thanks for your answers!!

Secondly, I want to explain what I'm working on in order to answer why to rotate the image after extracting doesn't help! I'm programming a pattern pointing, this pattern is moving all time in real-time, it can rotate up-down right- left and I focus the overlay rectangle on the pattern everytime (while loop) to extract that region because the pattern is changing constantly. It would be much easier for me to extract a rotated rectangle, I have thought of doing what you have told me, but I think is not working because of the design of the program, anyway I will try to make it your way.

If you know about the "magical" function I´m looking for, please tell me! Sorry if my explanation is not clear enough!

Thanks again!!

[greg83]

Thanks a lot Andrey!!! I have tried your solution in my program and I think it's gonna work!!

best regards,

Greg

[BenParrott]

If you have Vision Development Module 2009, you can use IMAQ Extract Tetragon. This VI can extract any 4 sided polygon from an image, including a rotated rectangle.

Ben

[greg83]

Thanks Ben! That's exactly what I needed!! Problem solved!

[muks]

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If you have Vision Development Module 2009, you can use IMAQ Extract Tetragon. This VI can extract any 4 sided polygon from an image, including a rotated rectangle.

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That was one of the things in my wish list. 

[greg83]

 Sorry Muks! Maybe I read it too fast and didn't realized you wrote that solution!! Anyways thanks all of you guys for your anwers!!!