@@ -135,6 +135,8 @@ It is common to choose the $z$ axis to point **toward** the scene, and the $y$ a
We'll focus on the two main families of digital sensors: CCD and CMOS. In both families, the actual light sensing is based on the electron-hole pair generation in MOS photodiodes. The main difference is how this charge is converted to a signal, offering tradeoffs over complexity, signal-to-noise ratio and readout speed.
The **ISO** of a sensor is a metric characterizing its sensitivity to light. The same metric is used for both analog and digital sensors. The ISO of a film is a function of its chemistry, while the ISO of a digital sensor is a function of its digital gain. Standard ISO values follow a logarithmic scale: 100, 200, 400, 800, 1600, 3200, etc.
