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Main
Date: 24 Jul 2007 05:55:56
From: actuary@mchsi.com
Subject: Beginner question - image processing
|
To: All
THanks to many of you, I starting to do some very basic
astrophotography. I have on order the T-Ring for my Canon Digital
Rebel camera but last night was too beautiful to pass up. I tried
afocal
photography with the moon as the subject. I placed my camera on a
mount.
I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
with a 25 mm eyepiece.
The images looked decent when viewed on the camera LCD. I then viewed
the images on my laptop using the software that came with the camera.
I open the image with the proprietary software. The initial image
that appeared looked as if the image was out of focus but then,
without doing anything on my part, the image improved. I suspect that
the software appplies some algorithm to the image file but I couldn't
find any information about it.
Now the question. If my suspicion is correct, what kind of algorithm
is applies to the image file to improve the image.
Insights would be most appreciated.
Larry
Larry
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Date: 25 Jul 2007 08:58:37
From: actuary@mchsi.com
Subject: Re: Beginner question - image processing
|
On Jul 25, 8:35 am, Philippe HAAKE <berub...@NOSSSPAMfreesurf.ch >
wrote:
> >What image processing software do you suggest?
>
> >Larry
>
> Herllo,
>
> ImagesPlus....... not to expensive and very powerfull
>
> Best Greetings From SWITZERLAND
> Philippe HAAKE
> ICQ 3128404http://astrosurf.com/skylover/http://astrosurf.com/skylover/album/index.htmhttp://astrosurf.com/skylover/meteohttp://www.astro-ge.net/
>
> beruberu@NOSBSPAMfreesurfDOTch
> !!!!!!REMOVE NOSBSPAM FROM MY E-MAIL!!!!!!
>
> Spammers, here are some email addresses for your spambots:
> itum...@itu.int fcci...@fcc.gov i...@crtc.gc.ca priv...@aca.gov.au
> p...@private-citizen.com p...@privacyrights.org p...@privacy.org
> i...@epic.org comme...@cauce.org $LOGIN@localhost $LOGNAME@localhost $USER@localhost
> $USER@$HOST -h1024@localhost r...@mailloop.com admin@loopback u...@ftc.gov sweep....@accc.gov.au fraudi...@psinet.com a...@w.com
Philippe:
Thanks
Larry
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Date: 25 Jul 2007 08:57:07
From: actuary@mchsi.com
Subject: Re: Beginner question - image processing
|
On Jul 24, 11:36 pm, Davoud <s...@sky.net > wrote:
> actu...@mchsi.com wrote:
> > To: All
>
> > THanks to many of you, I starting to do some very basic
> > astrophotography. I have on order the T-Ring for my Canon Digital
> > Rebel camera but last night was too beautiful to pass up. I tried
> > afocal
> > photography with the moon as the subject. I placed my camera on a
> > mount.
>
> > I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
> > with a 25 mm eyepiece.
>
> > The images looked decent when viewed on the camera LCD. I then viewed
> > the images on my laptop using the software that came with the camera.
>
> > I open the image with the proprietary software. The initial image
> > that appeared looked as if the image was out of focus but then,
> > without doing anything on my part, the image improved. I suspect that
> > the software appplies some algorithm to the image file but I couldn't
> > find any information about it.
>
> > Now the question. If my suspicion is correct, what kind of algorithm
> > is applies to the image file to improve the image.
>
> > Insights would be most appreciated.
>
> No, the Canon software is not doing anything to the image
> automatically. It takes a surprising amount of computer and software
> horsepower to render that large image on your display, and rather than
> keep you looking at a blank screen while the rendering is underway the
> Canon software puts up a low-res version as it renders the full-res
> version. The full-res version then replaces the low-res version, andDavoud:
> that is the point at which you see the image improve in sharpness.
> Certain other software displays images in the same manner, even on
> powerful computers with lots of video RAM.
>
> Davoud
>
> --
> usenet *at* davidillig dawt com- Hide quoted text -
>
> - Show quoted text -
Davoud:
Thanks.
Larry
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Date: 25 Jul 2007 04:36:30
From: Davoud
Subject: Re: Beginner question - image processing
|
actuary@mchsi.com wrote:
> To: All
>
> THanks to many of you, I starting to do some very basic
> astrophotography. I have on order the T-Ring for my Canon Digital
> Rebel camera but last night was too beautiful to pass up. I tried
> afocal
> photography with the moon as the subject. I placed my camera on a
> mount.
>
> I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
> with a 25 mm eyepiece.
>
> The images looked decent when viewed on the camera LCD. I then viewed
> the images on my laptop using the software that came with the camera.
>
> I open the image with the proprietary software. The initial image
> that appeared looked as if the image was out of focus but then,
> without doing anything on my part, the image improved. I suspect that
> the software appplies some algorithm to the image file but I couldn't
> find any information about it.
>
> Now the question. If my suspicion is correct, what kind of algorithm
> is applies to the image file to improve the image.
>
> Insights would be most appreciated.
No, the Canon software is not doing anything to the image
automatically. It takes a surprising amount of computer and software
horsepower to render that large image on your display, and rather than
keep you looking at a blank screen while the rendering is underway the
Canon software puts up a low-res version as it renders the full-res
version. The full-res version then replaces the low-res version, and
that is the point at which you see the image improve in sharpness.
Certain other software displays images in the same manner, even on
powerful computers with lots of video RAM.
Davoud
--
usenet *at* davidillig dawt com
|
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Date: 24 Jul 2007 09:21:43
From: actuary@mchsi.com
Subject: Re: Beginner question - image processing
|
On Jul 24, 11:10 am, "George" <geo...@yourservice.com > wrote:
> <actu...@mchsi.com> wrote in message
>
> news:1185281756.235327.192050@m3g2000hsh.googlegroups.com...
>
>
>
>
>
> > To: All
>
> > THanks to many of you, I starting to do some very basic
> > astrophotography. I have on order the T-Ring for my Canon Digital
> > Rebel camera but last night was too beautiful to pass up. I tried
> > afocal
> > photography with the moon as the subject. I placed my camera on a
> > mount.
>
> > I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
> > with a 25 mm eyepiece.
>
> > The images looked decent when viewed on the camera LCD. I then viewed
> > the images on my laptop using the software that came with the camera.
>
> > I open the image with the proprietary software. The initial image
> > that appeared looked as if the image was out of focus but then,
> > without doing anything on my part, the image improved. I suspect that
> > the software appplies some algorithm to the image file but I couldn't
> > find any information about it.
>
> > Now the question. If my suspicion is correct, what kind of algorithm
> > is applies to the image file to improve the image.
>
> > Insights would be most appreciated.
>
> > Larry
>
> > Larry
>
> I wouldn't worry about that. You are probably using Cannon's Digital Photo
> Professional (I also assume that you have the camera set to take raw images
> and not compressed ones, right?). Windows sees the camera memory stick as
> a flash drive, and so you can open "my computer", then open the cannon
> rebel camera "flash drive", and then download the raw images to a new
> folder. Then you can use Digital Photo Professional to convert the raw
> images (which are not .fits files, unfortunately, but are cannon
> propriatary raw image files - .crw) to .tif files. Then you can open them
> in whatever digital image processing software you have. If you want to
> stack them, deepskystacker is a good one, and is free. After stacking, you
> can further process them in photoshop, if you have it, or some other decent
> processing software.
>
> I hope this helps.
>
> George- Hide quoted text -
>
> - Show quoted text -
Chris, Martin and George:
Thanks.
While I'm evaluating and learning image processing software, I have
aquestion concerning the Canon proprietary software - Digital
Professional.
I can concert a .crw file to a .tif file and save and eventually print
on my HP Photosmart 7960 photo printer. I can view the original image
and "enlarge" it by using "50% View" I would like to be able to print
the "enlarged" image but can't seem to do that.
Any suggestions?
Larry
|
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Date: 24 Jul 2007 15:07:31
From: George
Subject: Re: Beginner question - image processing
|
<actuary@mchsi.com > wrote in message
news:1185294103.923376.214920@22g2000hsm.googlegroups.com...
> On Jul 24, 11:10 am, "George" <geo...@yourservice.com> wrote:
>> <actu...@mchsi.com> wrote in message
>>
>> news:1185281756.235327.192050@m3g2000hsh.googlegroups.com...
>>
>>
>>
>>
>>
>> > To: All
>>
>> > THanks to many of you, I starting to do some very basic
>> > astrophotography. I have on order the T-Ring for my Canon Digital
>> > Rebel camera but last night was too beautiful to pass up. I tried
>> > afocal
>> > photography with the moon as the subject. I placed my camera on a
>> > mount.
>>
>> > I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
>> > with a 25 mm eyepiece.
>>
>> > The images looked decent when viewed on the camera LCD. I then viewed
>> > the images on my laptop using the software that came with the camera.
>>
>> > I open the image with the proprietary software. The initial image
>> > that appeared looked as if the image was out of focus but then,
>> > without doing anything on my part, the image improved. I suspect that
>> > the software appplies some algorithm to the image file but I couldn't
>> > find any information about it.
>>
>> > Now the question. If my suspicion is correct, what kind of algorithm
>> > is applies to the image file to improve the image.
>>
>> > Insights would be most appreciated.
>>
>> > Larry
>>
>> > Larry
>>
>> I wouldn't worry about that. You are probably using Cannon's Digital
>> Photo
>> Professional (I also assume that you have the camera set to take raw
>> images
>> and not compressed ones, right?). Windows sees the camera memory stick
>> as
>> a flash drive, and so you can open "my computer", then open the cannon
>> rebel camera "flash drive", and then download the raw images to a new
>> folder. Then you can use Digital Photo Professional to convert the raw
>> images (which are not .fits files, unfortunately, but are cannon
>> propriatary raw image files - .crw) to .tif files. Then you can open
>> them
>> in whatever digital image processing software you have. If you want to
>> stack them, deepskystacker is a good one, and is free. After stacking,
>> you
>> can further process them in photoshop, if you have it, or some other
>> decent
>> processing software.
>>
>> I hope this helps.
>>
>> George- Hide quoted text -
>>
>> - Show quoted text -
>
> Chris, Martin and George:
>
> Thanks.
>
> While I'm evaluating and learning image processing software, I have
> aquestion concerning the Canon proprietary software - Digital
> Professional.
>
> I can concert a .crw file to a .tif file and save and eventually print
> on my HP Photosmart 7960 photo printer. I can view the original image
> and "enlarge" it by using "50% View" I would like to be able to print
> the "enlarged" image but can't seem to do that.
>
> Any suggestions?
>
> Larry
Oops. I just noticed that you said "photo printer". Is that one that
prints actual photgraphs? If so, then you will probably need to re-read
the manual to see what the image size needs to be for whatever paper you
are using. Still you should be able to see what how it will fit on the
paper by using the print preview mode.
George
|
| | |
Date: 24 Jul 2007 15:05:16
From: George
Subject: Re: Beginner question - image processing
|
<actuary@mchsi.com > wrote in message
news:1185294103.923376.214920@22g2000hsm.googlegroups.com...
> On Jul 24, 11:10 am, "George" <geo...@yourservice.com> wrote:
>> <actu...@mchsi.com> wrote in message
>>
>> news:1185281756.235327.192050@m3g2000hsh.googlegroups.com...
>>
>>
>>
>>
>>
>> > To: All
>>
>> > THanks to many of you, I starting to do some very basic
>> > astrophotography. I have on order the T-Ring for my Canon Digital
>> > Rebel camera but last night was too beautiful to pass up. I tried
>> > afocal
>> > photography with the moon as the subject. I placed my camera on a
>> > mount.
>>
>> > I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
>> > with a 25 mm eyepiece.
>>
>> > The images looked decent when viewed on the camera LCD. I then viewed
>> > the images on my laptop using the software that came with the camera.
>>
>> > I open the image with the proprietary software. The initial image
>> > that appeared looked as if the image was out of focus but then,
>> > without doing anything on my part, the image improved. I suspect that
>> > the software appplies some algorithm to the image file but I couldn't
>> > find any information about it.
>>
>> > Now the question. If my suspicion is correct, what kind of algorithm
>> > is applies to the image file to improve the image.
>>
>> > Insights would be most appreciated.
>>
>> > Larry
>>
>> > Larry
>>
>> I wouldn't worry about that. You are probably using Cannon's Digital
>> Photo
>> Professional (I also assume that you have the camera set to take raw
>> images
>> and not compressed ones, right?). Windows sees the camera memory stick
>> as
>> a flash drive, and so you can open "my computer", then open the cannon
>> rebel camera "flash drive", and then download the raw images to a new
>> folder. Then you can use Digital Photo Professional to convert the raw
>> images (which are not .fits files, unfortunately, but are cannon
>> propriatary raw image files - .crw) to .tif files. Then you can open
>> them
>> in whatever digital image processing software you have. If you want to
>> stack them, deepskystacker is a good one, and is free. After stacking,
>> you
>> can further process them in photoshop, if you have it, or some other
>> decent
>> processing software.
>>
>> I hope this helps.
>>
>> George- Hide quoted text -
>>
>> - Show quoted text -
>
> Chris, Martin and George:
>
> Thanks.
>
> While I'm evaluating and learning image processing software, I have
> aquestion concerning the Canon proprietary software - Digital
> Professional.
>
> I can concert a .crw file to a .tif file and save and eventually print
> on my HP Photosmart 7960 photo printer. I can view the original image
> and "enlarge" it by using "50% View" I would like to be able to print
> the "enlarged" image but can't seem to do that.
>
> Any suggestions?
>
> Larry
There's where I can't help you much. My printer is on the fritz. You
should be able to open up a print preview in whatever software you are
using to process the image and adjust the image to fit on the paper. Other
than that, I can't give you much more advice. I have in the past had to
adjust the image size to get it to fit. If you are using 8.5"x11" paper,
then you will need to keep the image size smaller than this (adjusting for
margins, of course). 6"x9" usually worked for me.
George
|
| |
Date: 24 Jul 2007 12:10:21
From: George
Subject: Re: Beginner question - image processing
|
<actuary@mchsi.com > wrote in message
news:1185281756.235327.192050@m3g2000hsh.googlegroups.com...
> To: All
>
> THanks to many of you, I starting to do some very basic
> astrophotography. I have on order the T-Ring for my Canon Digital
> Rebel camera but last night was too beautiful to pass up. I tried
> afocal
> photography with the moon as the subject. I placed my camera on a
> mount.
>
> I have a Celestron 8 on a Losmandy mount. I used a 2X Barlow lens
> with a 25 mm eyepiece.
>
> The images looked decent when viewed on the camera LCD. I then viewed
> the images on my laptop using the software that came with the camera.
>
> I open the image with the proprietary software. The initial image
> that appeared looked as if the image was out of focus but then,
> without doing anything on my part, the image improved. I suspect that
> the software appplies some algorithm to the image file but I couldn't
> find any information about it.
>
> Now the question. If my suspicion is correct, what kind of algorithm
> is applies to the image file to improve the image.
>
> Insights would be most appreciated.
>
> Larry
>
> Larry
I wouldn't worry about that. You are probably using Cannon's Digital Photo
Professional (I also assume that you have the camera set to take raw images
and not compressed ones, right?). Windows sees the camera memory stick as
a flash drive, and so you can open "my computer", then open the cannon
rebel camera "flash drive", and then download the raw images to a new
folder. Then you can use Digital Photo Professional to convert the raw
images (which are not .fits files, unfortunately, but are cannon
propriatary raw image files - .crw) to .tif files. Then you can open them
in whatever digital image processing software you have. If you want to
stack them, deepskystacker is a good one, and is free. After stacking, you
can further process them in photoshop, if you have it, or some other decent
processing software.
I hope this helps.
George
|
| |
Date: 24 Jul 2007 13:53:43
From:
Subject: Re: Beginner question - image processing
|
On Jul 24, 6:33 am, "actu...@mchsi.com" <actu...@mchsi.com > wrote:
> What image processing software do you suggest?
Hi Larry,
A great and FREE image processor (editor) is GIMP. Here is the url:
http://www.gimp.org/
It will do most anything to an image that the beginning, or even more
advanced, astrophotographer wants to do.
Hope it serves you well,
Martin R. Howell
Moderated sci.astro.amateur
www.moderatedsciastroamateur.org
|
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Date: 24 Jul 2007 06:33:43
From: actuary@mchsi.com
Subject: Re: Beginner question - image processing
|
On Jul 24, 8:18 am, Chris L Peterson <c...@alumni.caltech.edu > wrote:
> On Tue, 24 Jul 2007 05:55:56 -0700, "actu...@mchsi.com"
>
> <actu...@mchsi.com> wrote:
> >The images looked decent when viewed on the camera LCD. I then viewed
> >the images on my laptop using the software that came with the camera.
>
> >I open the image with the proprietary software. The initial image
> >that appeared looked as if the image was out of focus but then,
> >without doing anything on my part, the image improved. I suspect that
> >the software appplies some algorithm to the image file but I couldn't
> >find any information about it.
>
> I doubt that is what's happening. Most likely, the software is simply
> loading some sort of low resolution thumbnail initially (which looks
> blurry because it's been blown up to the full image size), and then
> brings in the entire image somewhat slower. None of the Canon software
> I've used has any sort of automatic sharpening.
>
> Are you taking your images in RAW format? That's important, as JPEG
> images don't allow for much image processing.
>
> _________________________________________________
>
> Chris L Peterson
> Cloudbait Observatoryhttp://www.cloudbait.com
Chris:
Thanks. I hadn't thought of the possibility that you suggested.
Yes, I am taking RAW images.
What image processing software do you suggest?
Larry
|
| | |
Date: 25 Jul 2007 15:35:54
From: Philippe HAAKE
Subject: Re: Beginner question - image processing
|
>
>What image processing software do you suggest?
>
>Larry
Herllo,
ImagesPlus....... not to expensive and very powerfull
Best Greetings From SWITZERLAND
Philippe HAAKE
ICQ 3128404
http://astrosurf.com/skylover/
http://astrosurf.com/skylover/album/index.htm
http://astrosurf.com/skylover/meteo
http://www.astro-ge.net/
beruberu@NOSBSPAMfreesurfDOTch
!!!!!!REMOVE NOSBSPAM FROM MY E-MAIL!!!!!!
Spammers, here are some email addresses for your spambots:
itumail@itu.int fccinfo@fcc.gov info@crtc.gc.ca privacy@aca.gov.au
pci@private-citizen.com prc@privacyrights.org pi@privacy.org
info@epic.org comments@cauce.org $LOGIN@localhost $LOGNAME@localhost $USER@localhost
$USER@$HOST -h1024@localhost root@mailloop.com admin@loopback uce@ftc.gov sweep.day@accc.gov.au fraudinfo@psinet.com a@w.com
|
| | |
Date: 24 Jul 2007 13:49:49
From: Chris L Peterson
Subject: Re: Beginner question - image processing
|
On Tue, 24 Jul 2007 06:33:43 -0700, "actuary@mchsi.com"
<actuary@mchsi.com > wrote:
>Thanks. I hadn't thought of the possibility that you suggested.
>
>Yes, I am taking RAW images.
>
>What image processing software do you suggest?
I strongly prefer the combination of MaximDL and Photoshop to anything
else I've tried, but that's an expensive option. For working with DSLR
images, you might consider Images Plus. I personally dislike the
program, but it is quite capable and many people like it a lot. It
supports many technical image processing features like dark subtraction
(which you may or may not need with your camera).
_________________________________________________
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
|
| |
Date: 24 Jul 2007 13:18:19
From: Chris L Peterson
Subject: Re: Beginner question - image processing
|
On Tue, 24 Jul 2007 05:55:56 -0700, "actuary@mchsi.com"
<actuary@mchsi.com > wrote:
>The images looked decent when viewed on the camera LCD. I then viewed
>the images on my laptop using the software that came with the camera.
>
>I open the image with the proprietary software. The initial image
>that appeared looked as if the image was out of focus but then,
>without doing anything on my part, the image improved. I suspect that
>the software appplies some algorithm to the image file but I couldn't
>find any information about it.
I doubt that is what's happening. Most likely, the software is simply
loading some sort of low resolution thumbnail initially (which looks
blurry because it's been blown up to the full image size), and then
brings in the entire image somewhat slower. None of the Canon software
I've used has any sort of automatic sharpening.
Are you taking your images in RAW format? That's important, as JPEG
images don't allow for much image processing.
_________________________________________________
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
|
|
