You are not logged in. [Login] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Solar Previous   Index   Next   Threaded   Pages: 1 DavidM sage Reged: 03/25/06 Posts: 217 Loc: Sohar, Oman Stacking extra frames       #2253500 - 03/12/08 07:12 PM Attachment (26 downloads) Edit   Reply   Quote Quick Reply   Hi all, I've just been playing around seeing how many frames are worth stacking from a typical .avi and surprised myself to find that I could incorporate a whole lot more frames of lesser quality and end up with a more detailed image. I had previously just gone for the best 10-15% of frames, but tried stacking 50% instead and ended up with a better result. I had assumed that only the highest quality frames would be useful, but I guess that statistics wins if you can stack enough frames (in these cases I was selecting from 7000-9000 frames in total). What percentage of frames do people here normally use to stack with (though I realise this will vary from capture to capture)? I have attached a comparison between the two stacks and also added a prom from the same session stacked with about 50% of the data. -------------------- David 16" Meade Lightbridge 70 mm Coronado Helios 1 H-a scope 8" Celestron 8iSE 80 mm Orion EON Post Extras:       DavidM sage Reged: 03/25/06 Posts: 217 Loc: Sohar, Oman Re: Stacking extra frames [Re: DavidM]       #2253503 - 03/12/08 07:13 PM Attachment (22 downloads) Edit   Reply   Quote Quick Reply   the reprocessed version -------------------- David 16" Meade Lightbridge 70 mm Coronado Helios 1 H-a scope 8" Celestron 8iSE 80 mm Orion EON Post Extras:       DavidM sage Reged: 03/25/06 Posts: 217 Loc: Sohar, Oman Re: Stacking extra frames [Re: DavidM]       #2253504 - 03/12/08 07:14 PM Attachment (25 downloads) Edit   Reply   Quote Quick Reply   And another prom -------------------- David 16" Meade Lightbridge 70 mm Coronado Helios 1 H-a scope 8" Celestron 8iSE 80 mm Orion EON Post Extras:       DavidM sage Reged: 03/25/06 Posts: 217 Loc: Sohar, Oman Re: Stacking extra frames [Re: DavidM]       #2253506 - 03/12/08 07:14 PM Edit   Reply   Quote Quick Reply   I have gone a bit too far with the processing on the second image, but you get the idea. -------------------- David 16" Meade Lightbridge 70 mm Coronado Helios 1 H-a scope 8" Celestron 8iSE 80 mm Orion EON Post Extras:       darkstar528 Postmaster Reged: 03/06/07 Posts: 6780 Loc: Hodgenville, Kentucky, USA Re: Stacking extra frames [Re: DavidM]       #2253741 - 03/12/08 08:55 PM Edit   Reply   Quote Quick Reply   Love em!... -------------------- Blue skies, Stephen "Darkstar" Ames PST(#96038), VIXEN 8-24mm,CEMAX 2x Barlow, Thousand Oaks White Light Filter and a Meade Elec EP CFI, CFII, MEI, working on EIEIO! BAA Member My solar site: http://seemysunspot.com Post Extras:       Oldfield Postmaster Reged: 03/20/02 Posts: 5814 Loc: Hong Kong Re: Stacking extra frames [Re: darkstar528]       #2253779 - 03/12/08 09:14 PM Edit   Reply   Quote Quick Reply   yes... stacking is just to reduce noise, and if noise is low enough, it makes no sense to stack more. -------------------- The Home Astronomer from a city where most people are proud of the light pollution Toys: Orion 100ED, Ranger with NGF-CM, SM40/BF10, TG-SP II, LXD55, DMK 31AF03, Canon 10x30 IS... My observation log and ideas My General Blog Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 12 registered and 3 anonymous users are browsing this forum. Moderator:  Don W, spaceydee  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 375 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Observing* -----   NEO   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Other* -----   Science of Astronomy & Space Exploration   AstroWebsites   Space Rocks CN Forums Home

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