Some digital cameras take an additional dark frame just before the shot and subtract it on the fly. You might want to check and make sure yours isn't one of those. Actually the noise is related to a lot of factors and it doesn't change as fast as you may think. Kent Gittings
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Frantisek Vlcek Sent: Sunday, December 16, 2001 7:00 AM To: [EMAIL PROTECTED] Subject: Re: ? PShop darkframe subst Thanks for explanation! Guess I will have to use more conventional noise removal techniques, as I think (as Mark pointed out) the noise would change too much between the dark shot and normal shot - after all, it's called "noise", being irregular. I am not sure if it can work very well in the E20, btw, won't the noise pattern change too much even if they do it just before exposure? they must be very quick. Colour noise is not much problem, easy to remove, but what is a problem is luminance noise, extremely hard to remove without sacrificing detail. I find out that giving more exposure usually helps, but I used so far my digicam almost only to get news pictures of a music festival, where of course lighting wasn't ideal, so I had to use 400 iso anyway. For newspaper, it was ok fortunately. Frantisek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
