1 Mar
2005
1 Mar
'05
8:22 p.m.
On Tue, 1 Mar 2005 18:04:54 -0800 (PST), Tom Jennings <tomj at wps.com> wrote:
Unlike film, you can'y simply open the shutter and
integrate the
image over time arbitrarily. CCDs are extremely noisy; silver
nitrate (etc) it's at atomic scale.
I routinely have to manually (GIMP) remove noisy pixels from my 30+
second night shots. It's a hazard with long exposure CCD shots.
My Olympus D-10 (4MP) has about 20-30 pixels that *scream* to full
blue, red, or white intensity from long exposure times. Nothing to do
but mute each one down later.
-ethan