DETERMINATION OF A SALT-WATER INTERFACE BY ELECTRIC RESISTIVITY DEPTH SOUNDINGS

A photo-printing apparatus is provided which includes a projection exposure device for projection-exposing an image formed on a film, digital exposure device for exposing a digital image, a reader for reading print size data and image data of one roll of film, and a controller for calculating a digital exposure position on the basis of the print size data and image data read by the reader and conveying a photosensitive material to the digital exposure position, whereby a series of printing operations of the projection exposure device is achieved in parallel with a series of digital printing operations of the digital exposure device.