From: "milton_aupperle" <milton@outcastsoft.com>
Date: April 20, 2005 11:44:48 AM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Jupiter Sharpness Comparison
Hi folks;
I had very good stable skies last night as the jet stream shifted way
north of me into the North West Territories and Arctic. So I managed
to get some good shots of Jupiter (with GSR) and Luna last night -
accumulating another 9 gigabytes of 16 bit video movies.
Since I finally had some decent shots of Jupiter to work with, I ran
the same movie through Astro IIDC for stacking and alignment, and then
varied the pre sharpness amount in each run from none to extreme.
Astro IIDC has the ability to sharpen each frame before stacking and
aligning them - which in theory should help accentuate subtle features
as long as the CCD gain noise isn't too high.
You can read about it and see the (subtle) difference that it makes in
the Jup_Comp_050419.jpg file in the Planetary folder. The 16 bit tiff
is a little bit easier to see the subtle differences too.
One thing I'm now more convinced of now is that 16 bit planetary
imaging does make a difference for very subtle features. However to
take advantage of it you need very good seeing conditions (and have to
stay in 16 processing from start to finnish) - otherwise
it may not be worth the money.
TTYL..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1005 - 815 14th Avenue. S.W.
Calgary Alberta Canada T2R0N5
1-(403)-229-9456
milton@outcastsoft.com
www.outcastsoft.com