Glossary

CFA

Short for Colour Filter Array.

Colour Filter Array

Array of various colour filter used to enable measurement of colour images using a monochromatic sensor by sampling different colours from neighbouring points. Usual arrangements red, green and blue pixels are referred to as Bayer filters.

DN

Short for Digital Number.

Digital Number

Values received from the sensor (after analog-to-digital conversion and possible sensor firmware modification).

Fabry-Perot interferometer

Optical component composed of two parallel mirrors with a set air gap between them. Used as a tunable bandpass filter in hyperspectral imagers. See Wikipedia for more.