28 Feb
2005
28 Feb
'05
11:51 a.m.
>>>> "Tom" == Tom Jennings
<tomj at wps.com> writes:
Tom> I've noticed my low-light digital photos look muddy too, I don't
Tom> know what's goin on there, maybe someone here does.
That's noise in the sensor. Photoshop may be able to help a bit with
that. Cooling the sensor helps too, but that's probably not practical
for a camera. (It's how astronomers use CCD sensors, I believe. Some
vague memory says that liquid nitrogen works really well here. It
certainly did in an image intensifier demo I saw at the local
astronomy club 30 years ago.)
paul