P. J. Alling wrote:

>It would be possible to check for byte by byte comparisons, by using
>"FC" a "dos" utility available on all windows systems to delete
>duplicate files no matter what their name, I'm sure that linux/unix has
>such a utility but I can't remember it's name right now.  There are
>several problems to overcome, none of which will solve the most
>important one.  There must be a way for the computer to recognize a
>duplicate image, not a duplicate file. 

If one is in JPEG format and the other is in a straight bitmapped 
format like TIFF/RAW/DNG they won't be the same image, technically. 
They certainly won't be the same byte-for-byte. Not even close.


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