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. Its another part of the twentieth-century mind. Its the world seen from inside. Weve 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 theres anything about us more important than the fact that were constantly on film, constantly watching ourselves.”
—Don Delillo (b. 1926)
“So God stepped over to the edge of the world
And He spat out the seven seas;
He batted His eyes, and the lightnings flashed;
He clapped His hands, and the thunders rolled;
And the waters above the earth came down,
The cooling waters came down.”
—James Weldon Johnson (18711938)