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Old 04-11-2007, 12:44 PM
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First Try

My first try at CCD Imaging with an 8" F5.6 on an EQ6 mount, DSI Pro with IR filter. Around 12 images each stacked in Registack. Seeing was average, focus could be better.

Must put my glasses on next time

Alexander
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Old 04-11-2007, 02:11 PM
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They look great. Have that cursed DSI Pro interlace problem though.....
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Old 04-11-2007, 02:44 PM
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Looks good, pity about that stupid interlacing
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Old 04-11-2007, 03:03 PM
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The interlacing can be removed with Photoshop under Filters>Video>de-interlace. If you have it that is. I just tried it and it cleaned it quite well.

Nice shots by the way.
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Old 04-11-2007, 03:46 PM
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Andrew, any chance of seeing the difference after interlacing removal in photoshop.

With Alexander's permission of course.

David
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Old 04-11-2007, 04:10 PM
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Here is my effort (Hope you don't mind Alexander )

Composite image showing both states - the left hand side is normal, right side has simply had the deinterlacing done as above, no further processing at all. I left Photoshop's default settings in place for the deinterlace filter.
The capture program I use (Nebulosity) has this function also.
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Old 04-11-2007, 04:39 PM
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That's a great composite image Lee showing what can be done to remove interlacing with a really good result.

I'm sure Alexander will be keen to try this as his first images on the DSI Pro were really good apart from the interlacing.

We too have learnt something new. - Thanks
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Old 04-11-2007, 05:32 PM
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That deinterlacing works wonders on the image
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Old 04-11-2007, 06:10 PM
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worked a treat. now it looks good.

now you know how to fix it post more.
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Old 04-11-2007, 06:24 PM
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Great first result. Why does the DSI do that interlacing in the first place? I can't see a reason for it except to frustrate the imager
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Old 04-11-2007, 07:01 PM
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I think it is do with how the data is read from the CCD.... apparently much worse with shorter exposures too. Succeeds in the frustration department though! What gets me is why Meade doesn't automatically deinterlace it for you....
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Old 04-11-2007, 08:54 PM
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When they were first released I was a member of a DSI yahoo group. The
interlaced problem touted there was. It went something like this, with the
DSI it scans it data twice per image like scanning odd lines first then goes
back and scans the even numbered lines. The problem with interlacing
starts to appear at short exposures like needed for luna and planetary
imaging. Thats not to say there haven't been some fantastic images
of luna and planetary objects, hence the o'l deinterlacing in PS works
a treat.

just my 2 cent worth, correct me if I'm wrong.

regards,CS
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Old 04-11-2007, 09:00 PM
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btw, I ran those images through deinterlacing in PS you would never known
those lines were there : ) did the same thing as Lee

regards,CS
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  #14  
Old 04-11-2007, 09:18 PM
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You do see it on long exposure too - but seems fainter - shows up as you stretch the image.
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Old 05-11-2007, 02:52 PM
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Quote:
Originally Posted by Tamtarn View Post
Andrew, any chance of seeing the difference after interlacing removal in photoshop.

With Alexander's permission of course.

David
Go for it

Alexander
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  #16  
Old 05-11-2007, 03:11 PM
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De - Interlace

Thanks all for your kind remarks. Hope to have my 10" F6 going withing a couple of weeks and do a bit better

As to the tip on de-interlacing in photoshop - THANKS - took a while before I understood what you meant.

To be honest, I didn't notice any lines at first, old age and bad eyesight, until a mate said something along the lines that he would find out how to get rid of the lines, What lines I said

But after all you bods mentioned lines I enlarged the image on the LCD monitor and saw what you meant.

Alexander
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Old 05-11-2007, 07:25 PM
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Great pics Alexander, and nice work with the deinterlasing (I will have to remember that trick!)
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  #18  
Old 05-11-2007, 10:57 PM
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Pic is below fixed.

ok here is the right image lol..
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Old 05-11-2007, 11:05 PM
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did you have a satellite go through too? got this weird line through the image also. Although satellites tend to look like black blobs on a lit moon.
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  #20  
Old 06-11-2007, 12:06 PM
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Quote:
Originally Posted by Astroman View Post
did you have a satellite go through too? got this weird line through the image also. Although satellites tend to look like black blobs on a lit moon.
What line are we talking about now ??? Can't remember a satelitte.

Have played around with some crummy images in Registack and found some images with lines in it which I put down to stacking error. Not enough alignment points.
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