An entire century of history recorded on film is stored private homes or in institutions, such as museums, foundations and archives. However even with ideal storage conditions, deterioration in image quality is only a question of time. Analog images have to be transferred to a digital medium.
Scanning vs. Re-Photographing
There are several ways to digitize analog images. Most common is the use of a desktop scanner or the photographing with a digital SLR camera, which is often also called re-photographing or duplicating.