Author Topic: Better star reduction  (Read 23532 times)

Offline DaveS

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Re: Better star reduction
« Reply #45 on: 2010 September 30 22:06:06 »
Hmm!, even a small crop is well over 1Mb, and the 'board' has a 192kb max image upload.

This means it would have to be a 'micro-crop' and as such would contain very little of the nebula, and few stars.

I can e-mail you the full image if you so desire.

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
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Baader LRGB and NB filters
DiY Observatory
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Offline DaveS

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Re: Better star reduction
« Reply #46 on: 2010 September 30 22:07:23 »
You may also downsample the bitdepth, change it to 8bits to save space. Anyway, a jpeg at 95% quality would be good enough.

Ah, crossed 'posts'  :laugh:

Ok, a jpeg it will be then  :)

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline DaveS

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Re: Better star reduction
« Reply #47 on: 2010 September 30 22:19:38 »
Sorry Carlos, the 16Bit image just doesn't like being saved as 8Bit. I can save it as a 16Bit TIFF, but that's still way to large.

E-mail seems the best option.

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline Carlos Milovic

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Re: Better star reduction
« Reply #48 on: 2010 October 01 02:18:33 »
It doesn't like it, but it does anyway. ;) PI saves the file as 8bits, and comprises it with the JPEG algorithm, but the working image remains unchanged (no compression, no bit downsample). Just ignore the warnings.

You may get my corporate mail from my forum profile ;)
Regards,

Carlos Milovic F.
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PixInsight Project Developer
http://www.pixinsight.com

Offline DaveS

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Re: Better star reduction
« Reply #49 on: 2010 October 01 10:10:09 »
Hi Carlos

The full res image (FIT) of IC5070 and it's associated star mask, have been e-mailed to your 'Hotmail' account.

Have sent them in two separate e-mails, in case your mail-box has a size limit. The main image is 5.52Mb and the star mask 2.76Mb.

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline DaveS

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Re: Better star reduction
« Reply #50 on: 2010 October 01 20:17:04 »
Well there seems to be some mysterious forces at work here  :o

Despite all of my efforts I could not get the MT reduced stars in the star mask of my IC5070 image (as sent to Harry and Carlos), to remain reduced in the underlying image, when the mask was removed.  ???

Yesterday I uninstalled PI and re-installed it, but no change.

Tonight, Harry successfully managed to make it all work on my image, and 'posted' a video of it on his website. So I followed Harry's move's one-by-one, and still it wouldn't work for me.

In desperation, I again uninstalled and re-installed PI, tried it yet again, and it all worked  8) :)

Now, it has often been said that astro image processing is a 'black art', maybe now I'm starting to believe it  :o

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline Carlos Milovic

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Re: Better star reduction
« Reply #51 on: 2010 October 01 20:56:29 »
Did you receive my email with the result today? Everything worked fine, straight using your mask.
Regards,

Carlos Milovic F.
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PixInsight Project Developer
http://www.pixinsight.com

Offline Carlos Milovic

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Re: Better star reduction
« Reply #52 on: 2010 October 01 20:57:53 »
Strange behavior :D I hope Juan jumps in, because this should not happen.
Regards,

Carlos Milovic F.
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Offline DaveS

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Re: Better star reduction
« Reply #53 on: 2010 October 01 21:07:21 »
Did you receive my email with the result today? Everything worked fine, straight using your mask.

No Carlos, it never arrived  ???

However, not to worry as it seems to be sorted now, but thanks for taking the time to try it out on my image.

Have just tried it again and its still working fine, and at least as I said to Harry, I can now move on with my assessment of PI  :)

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline DaveS

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Re: Better star reduction
« Reply #54 on: 2010 October 01 21:10:29 »
Strange behavior :D I hope Juan jumps in, because this should not happen.

Maybe something was corrupted in the 'download', but then I haven't downloaded it again, yet the problem cleared itself on the second re-install.

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/

Offline DaveS

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Re: Better star reduction
« Reply #55 on: 2010 October 02 14:42:06 »
Did you receive my email with the result today? Everything worked fine, straight using your mask.

Hi again Carlos

I found the missing e-mails, they had been filtered into the 'Spam Folder'  ::)

Thanks again for trying PI on the image, and your comments.

Dave
8" LX200ACF
William Optics FLT110
NEQ6 Mount
SXVF-H9
SXVR-16
SX Lodestar
DMK21AU04
Baader LRGB and NB filters
DiY Observatory
http://www.progressiveastroimaging.com/davesastronomy/