How to measure the shift between two resembling images using LabVIEW?

I am running an experiment in which I use a microscope to map the surface of a laboratory sample and due to some small drift consecutive image appear displaced. In order to correct for the drift I need to first measure it, which I can do by recording two images and finding the shift between. Because of some small random noise which adds to each image, the features in two consecutive images are not completely identical, but they do resemble each other very well. Do you have any suggestions on how to measure this image shift (in both x and y) using LabVIEW (I have version 8.20)?

Hi, thanks for the answer, I´ll try to see if a 2D cross-correlation will work. I also attached two typical images with a small shift between them (there is also some change in background between them, but I belive the shift should still be measurable).
Attachments:
Image1.png ‏285 KB
Image2.png ‏267 KB

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How to measure the shift between two resembling images using LabVIEW?

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