Arthur Korn's 1906 Machine Transmitted First Photograph by Wire

In October 1906, Arthur Korn's invention successfully transmitted a recognizable photograph over 1,800 kilometers of telegraph wire from Munich to Nuremberg. This breakthrough solved the challenge of converting continuous tones of light and shade in a photograph into electrical signals that could travel and be reconstructed at the receiving end. Previous attempts, like those by Alexander Bain and Giovanni Caselli, could transmit handwriting and line drawings but not the gradations of a photograph. Korn's machine, building on earlier scanning and conversion principles, allowed a photograph to be sent directly, marking a significant advancement in image transmission technology.