Nearly all of our amazing modern technology is based on the most rudimentary premise imaginable:
A switch is either “on” or “off” An electrical pulse is either present or not. The status of the charge is generally assigned a value. No charge is a “zero.” If a pulse is present it is a “one.”
Engineers translated successions of zeroes and ones into binary code For example, the decimal number 1000 is 001111101000 in binary! At first, eight bits of code were processed simultaneously. The typical CPU now processes 64 bits of code on each cycle.
So what does all of this have to do with pictures?
What we call a “photograph” these days is actually nothing more than a collection of ones and zeroes. There isn’t any film. The pictures are NOT on the card. There are only static charges of electricity.
Without a device than can interpret the zeroes and ones and make sense of them there are no pictures.
And if one thinks that these translation technologies will be available for ever I have three letters in mind that may change your mind: