Coloured spots remain after sensor clean

Hi,
I know that you're all sick of hearing about spots in photos... however, I've had my sensor cleaned... the dust spots are gone, but I have these coloured spots in the dark areas of my pics. (mostly in night shots) I was hoping someone would know what they are and how to get rid of them.
I'm using an EOS 20D. The spots are there with any lens.
In this pic here, there are dozens of the little buggers.
Cheers.

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Elija78,
They are known as hot spots, most if not all sensors have them and they show up in long exposures.

They are hot pixels, not sensor spots

Thanks,
can they be cooled down? (gotten rid of). Do they appear over time? I don't remember them being there in the early days...

Elija78,
One technique that works sometimes is to set your camera to sensor clean with lens and lens cap on for an exposure as long or longer then your photo (1-3 minutes should do). Not sure about your 20D but doesn't hurt to try

ahh.. excellent.. I shall give that a try.
Thanks John_B!

you could clone them out in PS or use noise reduction when taking long exposure the 20d has it.
Noise reduction?
The Digital Rebel XT and EOS 20D have optional long-exposure noise reduction, i.e., automatic dark frame subtraction. If this feature is turned on, then every time you take an exposure longer than 1 second, the camera will immediately take a second exposure of the same length with the shutter closed, and subtract it from the first, to eliminate noise from "hot pixels" (points on the sensor that give nonzero readings in the dark).

John_B wrote in post #6888285
Elija78,
One technique that works sometimes is to set your camera to sensor clean with lens and lens cap on for an exposure as long or longer then your photo (1-3 minutes should do). Not sure about your 20D but doesn't hurt to try

You don't expose in sensor clean

If you turn on long exposure noise reduction in the C.Fn's it shoots the image at say 20s iso 400, then shoots another image at 20s iso 400, but with the shutter closed, then subracts the second from the first, getting rid of most of the hot pixels....
(oh wait, the guy above me just said that, I really should refresh before posting :lol

I don't know what software you're using, but I have found Lightroom 2 to be very good at automatially removing hot pixels as a default.

I find that you can leave the lens on or cap the body then cover the eye cup, put your camera into manual sensor cleaning mode leave this way for a minute or so. Mine (40D) will map out the stuck pixels. If you are going to expose for extended lengths probably going to get some red spots.

Madweasel wrote in post #6890188
I don't know what software you're using, but I have found Lightroom 2 to be very good at automatially removing hot pixels as a default.

yep. the hot pixels magically disappear right before the image fully loads .

ed rader

Thanks everyone..