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Is there a way to perform selection of area on two images. I want to select only one time the region of interest and it should be applied to both the images at once.

I am trying to crop two images to reduce their size and I want to crop the images to smaller size.  As seen in  the attached picture I have crop two images and then the region and area of cropped images for these pictures are not same to for further processing of them results in incompatible image size error (for IMAQ LKP optical flow).  Can anyone please help me in obtaining a method so that I have to only choose one time the crop area and it will be performed on both the images simultaneously which could result in successful processing. 

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The VI shown is  Image processing for image motion 

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