DX Film Edge Barcode
Below the sprockets under each frame of 135 film is the DX film edge barcode. The barcode is invisible until the film has been developed. It is optically imprinted as a latent image during manufacturing. They are used by photo finishers to identify and align each frame for printing. It consists of two parallel linear barcodes, one for a synchronizing clock, and the other encoding film data such as type, manufacturer and frame number.(Kodak US patent 4965628)
Read more about this topic: DX Encoding
Famous quotes containing the words film and/or edge:
“Film is more than the twentieth-century art. It’s another part of the twentieth-century mind. It’s the world seen from inside. We’ve come to a certain point in the history of film. If a thing can be filmed, the film is implied in the thing itself. This is where we are. The twentieth century is on film.... You have to ask yourself if there’s anything about us more important than the fact that we’re constantly on film, constantly watching ourselves.”
—Don Delillo (b. 1926)
“They will tell me I talk about things I have never experienced but only dreamed—to which I might reply: it is a lovely thing to dream such dreams! And besides, our dreams are much more our experiences than we believe—we must relearn about dreams! If I have dreamed thousands of times about flying—would you not believe that when I am awake I also possess feelings and needs giving me an edge on most people—and...”
—Friedrich Nietzsche (1844–1900)