I have a photograph taken before 1883, of an ancestor. The photo has grown quite faint, but the face is still able to be made out. The top of the head has faded quite a bit, (this is a photo of an OLD man with long white beard). Is there anything that can be done to restore some contrast to this picture, ie. electronic means/scanning, etc? Also, what(if anything) can be done to prevent the further deterioration of this picture? Thanks for any help.