I have been looking for a solution to isolate markings and have not found anything on the internet that is close to for what I am looking. I am trying to isolate the markings in a series of pictures. I have one, unmarked image. I then have a series of identical images with markings. I would like to remove the original image from the succeeding images leaving only the markings "floating" on a white background. I have removed the color from the images, but that leaves the black and white original markings. I am looking for any hints, ideas, comments, …

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All, what I am trying to do is isolate markings (differences) in images. I have an unmarked image (I1), a marked image (I2) and a third image (I3). I would like to compare I2 against I1 and store the x,y (or array of pixels) of the differences (isolate markings). I liken this to subtracting I1 from I2 leaving the differences. I would then like to do the same with respect to I3 (subtract I1 from I3) THEN compare the result I3 versus I2. I found this link; http://jeffkreeftmeijer.com/2011/comparing-images-and-creating-image-diffs/ It shows (basically) I1 - I2 = difference. I would like to …

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The End.