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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 15 Sep 2012 (Saturday) 08:44
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DSS Question

 
ama168
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Sep 15, 2012 08:44 |  #1

I was just wondering if it was normal for DSS to take
71 hours to stack 276 images.
Or is it just that I have a crappy computer?;)


Bill
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rick_reno
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Sep 15, 2012 08:53 |  #2

that's a lot of images. what computer are you using?




  
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ama168
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Sep 15, 2012 09:30 |  #3

Hi Rick,
It's a Toshiba Satellite P505
64 bit
6 GB Memory


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NovaTJ
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Sep 15, 2012 19:19 as a reply to  @ ama168's post |  #4

If you have 2x or 3x drizzle checked, it can take awhile. Some of my 100 image stack jobs got started right after I'm done with imaging for the night.
I go to bed and hopefully, they are done by morning ready for processing.


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neimad19
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Sep 15, 2012 19:54 |  #5

What happens is, once you load the pictures to DSS the program automatically emails the light frames to a man named Yuri in the Ukraine. The darks, bias, flats..ect are not actually needed. Yuri prints every single image you send him and goes through them with a black sharpi pen. He looks at 2 pictures at a time and scans the images with his eyes, pixel by pixel, looking for differences in noise between the 2 images. When he identifies a pixel with random noise, he uses his ultra-fine tipped sharpi pen and blacks out that pixel. Once he has all of the copies noise free, he manually "stacks" (thats where the term image stacking came from) the pages in a neat pile and glues them all togather with transparent glue. Once the glue is completely dry he has a stack of images, noise free. Yuri then takes that harden stack of images and shines a very bright LED light through from the back and when viewed from the front you can see great in detail the resulting image. He uses modified 550D that is supercooled and produces nearly zero noise to capture a picture of the stack while it is held up against the LED light. He then sends this image back to DSS for you ready to view.

This is why it can take so long to stack a lot of images.




  
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Toxic ­ Coolaid
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Sep 15, 2012 20:01 |  #6

bw! That's pretty good.....

I could probably get a stack of 250 lights in 2.5 - 3 hours. But I have a new pretty fast laptop I use. My older desktop used to take twice that.




  
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ama168
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Sep 15, 2012 20:09 |  #7

Nova, No drizzle
Neimad, Ummm... Yeah.. LOL!! But seriously I wasn't asking why but if it was normal for a stack this size to take so long.
Reminds me of the commercial with Peggy.:lol:
http://www.youtube.com​/watch?v=F8L2cI8brzQ (external link)


Bill
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ama168
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Sep 15, 2012 20:11 |  #8

I would really hate to tie my computer up for three days and find at the end that the pic is worthless.


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DavidWatts
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Sep 16, 2012 00:33 |  #9

neimad19 wrote in post #14996559 (external link)
What happens is, once you load the pictures to DSS the program automatically emails the light frames to a man named Yuri ...
... He then sends this image back to DSS for you ready to view.
This is why it can take so long to stack a lot of images.

:-D


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dingie256
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Sep 16, 2012 02:17 |  #10

Sorry folks, I am totally new to astronomy. What does DSS stand for? Digitized Sky Survey?


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mrbubbles
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Sep 16, 2012 09:06 |  #11

dingie256 wrote in post #14997614 (external link)
Sorry folks, I am totally new to astronomy. What does DSS stand for? Digitized Sky Survey?

http://deepskystacker.​free.fr/english/index.​html (external link)


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Toxic ­ Coolaid
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Sep 16, 2012 12:58 |  #12

you should do a test run of 20 light frames just to get an idea of what you'll get. That should only take a few minutes. Also check and make sure you don't have a bunch of other stuff running. It might help some.




  
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ama168
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Sep 16, 2012 14:02 |  #13

Yeah I know Toxic, but I already have it running and don't want to start over.:lol:


Bill
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neimad19
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Sep 16, 2012 14:13 |  #14

Let us know how it goes!




  
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ama168
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Sep 16, 2012 14:46 as a reply to  @ neimad19's post |  #15

Will do, Should be sometime Tuesday.:rolleyes:


Bill
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