AFAIK there is no software for finding image files by content, especially not for finding one that is 'like' a scanned image.

There is software that can detect whether two files are identical, regardless of the file type, but that's not applicable here, since that process relies on a byte-by-byte comparison and a scanned image would be quite different in that regard from the original.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]