A reader sent me a message this morning saying that he is confused by all the acronyms associated with the current set of posts, and asked me to post a glossary that he could keep open as he read the others.
ADC – analog to digital converter
CFA – color filter array
CSV – comma-separated vlaues
dB – decibel; one-tenth of a Bell.
DC – direct current; the zero frequency component in the frequency domain
DN – you won’t see that acronym here; I find it awkward and tautological. I use count or LSB instead, depending on the context
F – spatial frequency
Fs – spatial sampling frequency
FWC – full-well capacity
ISO – I don’t think this actually stands for anything anymore; Possibly it used to, in some language-dependent way, stand for the International Organization for Standardization. Maybe someone can straighten me out. When used to identify film speed, it meant the same thing as ASA, which did indeed stand for the American Standards Organization.
LSB – least significant bit
Mu – mean, or average value
PRNU – photo response nonuniformity
Post-amp RN – read noise that occurs after the camera gain stage
Pre-amp RN – read noise that occurs before the camera gain stage
RN – read noise
ROI – region of interest
Sigma – standard deviation; the square root of the variance
SNR – Signal to noise ratio
TIFF – tagged image file format