From: "digidodi" <ddierick@gmail.com>

Date: February 11, 2010 4:16:38 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: Stacking slow?



Hi Alan,


could be the reason. At f/30 I am indeed quite noisy in the images. I noticed the blue stacking is a disaster. It is still busy since about an hour. Red image took about 30 minutes to stack, about same number of selected frames.

Next time I will try the gaussian blur first.


Dodi

--- In Astro_IIDC@yahoogroups.com, Alan Friedman <alan@...> wrote:


Hi Dodi,


I've experienced this at times with processing mars images... I thought it perhaps related to ASTROIIDC struggling with heavy noise in the image. I am shooting with my 10" at f45 and 33ms exposures, so the noise especially in blue is quite pronounced in the individual frames. Have you tried selecting the "gaussian blur frames for sharpness estimation and alignment" box  (I think that is close to the right wording.) This might help. 


Are you getting accurate alignment of the frames in these slow moving stacks?


best,

Alan




On Feb 11, 2010, at 5:14 PM, digidodi wrote:


Hi,


I am new to Astro II DC, coming from a Windows PC, now working with Mac for astrophotography. All seems to work fine, but the stacking is very slow compared to eg Registax on Windows. I tried Mars tonight, which takes a very long time to stack out of film of 3000 images. I am using a dual core 2.6Ghz notebook pro.


I tried to speed it up by making the selection region for sharpness estimates the center quadrant, and next selecting a user selected area for stacking of small size. The initial sharpness estimation goes very fast, but the stacking itself crawls through the movie.


Am I missing something? Doing something wrong?


tx


Dodi