Rather than remembering each pixel value as an address and three values for red, green, and blue (RGB), a program can check and discover that a whole region of the screen is the same color for the moment and simply say, for all the pixels between these two addresses, set them to these three values.

FORBES: Density Of Meaning: Creation As The Flip Side Of Memory

Those charges are funneled en masse through a single analog-to-digital converter, which outputs each pixel's value in ones and zeros.

FORBES: Sensitive Sensor

Since most image-processing operations, such as sharpening up a fuzzy document, or altering the colours in a photograph, involve looking at the value of a particular pixel and then altering it depending on the value of adjacent pixels, this is a real advantage.

ECONOMIST: Analogue computing