hello, I know that we have metadata about original image inside of a file with the prtrait. So, they mark which copy is original. If I change size or other changes - metadata will be desroyed. Thus, image made by my Nikon S1 or by iphone -original - all others - copies, because they are a result of my activity titled copying.
With kind regards, Daria Hookk Senior Researcher of the dept. of archaeology of Eastern Europe and Siberia of the State Hermitage Museum, ADIT board
