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I am working on a project to capture images via webcam in a predefined time interval, and continuously compare the images to a template (good image) and give an error if the difference is > tolerance set.
I working out using OpenCV. Would like to have advice how should I do it, e.g. best method, etc.
Appreciate if any one can help me on this. Thanks.
An easy way is to just take the L2-norm between the image pairs:
You’ll have to experiment with setting the appropriate threshold. Of course this method is not robust to lighting changes, viewpoint changes, etc but its simple and fast.