Tom C wrote:
Hot pixels are photosites on the sensor that are, in layman's terms, more sensitive to the light striking them, than average pixels. Therefore they turn 'ON' sooner and tend to be more visible during long exposures. Cold or dead pixels are photosites that are always turned 'OFF'. There are also stuck pixels. These are photosites that are always 'ON'.
Related, possibly stupid, question: Is there a built-in light calibration or "flat-field correction" mechanism designed to cancel out the effect of those hot pixels? (Or in general, the fact that some pixels are warmer than others even though they aren't necessarily very hot.) I've been thinking that this is what people are referring to when they talk about "white balance" etc., but then again, that might include only a per-channel gain...
- Toralf
