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#1
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Stacking for noise reduction
Hi Folks,
Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Thanks, Dudley |
#2
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Stacking for noise reduction
Dudley Hanks wrote:
Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Google helps. Examples: Search string: "" image stacking noise reduction "" http://www.flickr.com/groups/canonpo...7600370418804/ http://www.rocketroberts.com/astro/ccdnoise.htm http://tinymachineshop.blogspot.com/...-take-two.html .. .. .. .. .. .. .. .. -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI] gallery & rulz: http://www.pbase.com/shootin -- e-meil: Remove FreeLunch. -- usenet posts from gmail.com and googlemail.com are filtered out. |
#3
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Stacking for noise reduction
Alan Browne wrote:
Dudley Hanks wrote: Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Google helps. Examples: Search string: "" image stacking noise reduction "" http://www.flickr.com/groups/canonpo...7600370418804/ In this example, they show a high ISO shot but why use high ISO if you're on a tripod? I don't think this technique is very useful in normal photography... maybe if your camera only does 30 second exposures & you've got something very dark. Astrophotography isn't normal photography. http://www.rocketroberts.com/astro/ccdnoise.htm http://tinymachineshop.blogspot.com/...-take-two.html -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
#4
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Stacking for noise reduction
Dudley Hanks wrote:
Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Thanks, Dudley In what context, Dudley? You might find dark-frame-subtraction (which is a built-in feature of some cameras, or can be done manually) helps also, depending on what he is shooting. Registax is often mentioned by astronomers, but I haven't used it, only dark-frame occasionally... |
#5
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Stacking for noise reduction
"Paul Furman" wrote in message ... Alan Browne wrote: Dudley Hanks wrote: Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Google helps. Examples: Search string: "" image stacking noise reduction "" http://www.flickr.com/groups/canonpo...7600370418804/ In this example, they show a high ISO shot but why use high ISO if you're on a tripod? I don't think this technique is very useful in normal photography... maybe if your camera only does 30 second exposures & you've got something very dark. Astrophotography isn't normal photography. http://www.rocketroberts.com/astro/ccdnoise.htm http://tinymachineshop.blogspot.com/...-take-two.html -- Paul Furman www.edgehill.net The technique is a bit different, Paul, but my A720 is a bit noisier than I'd like, even at 100 ISO. I thought I'd try the technique to see if it can improve the quality of some of my pics. Since I do a lot of low-light work without any movement, I'm hoping that stacking will give me quality closer to that of a DSLR. Take Care, Dudley |
#6
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Stacking for noise reduction
"Alan Browne" wrote in message ... Dudley Hanks wrote: Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Google helps. Examples: Search string: "" image stacking noise reduction "" http://www.flickr.com/groups/canonpo...7600370418804/ http://www.rocketroberts.com/astro/ccdnoise.htm http://tinymachineshop.blogspot.com/...-take-two.html . . . Thanks for the links, Alan. They are just what I was looking for. Your Google query was much more presice than the one I tried and yielded much better links. Take Care, Dudley |
#7
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Stacking for noise reduction
If you are tripod based you may get the kind of results you are looking for
with HDR processing in a program like Photomatix--the Photoshop version leaves much to be desired. It is best to use identical images obtained with different exposures, at least 3 but it can be more depending on your desires/experience. You can use Photomatix to process as HDR images differently processed versions of the same image, particularly useful if you are beginning with a raw image, probably useless if you are using in-camera mutilated jpegs. |
#8
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Stacking for noise reduction
Paul Furman wrote:
Alan Browne wrote: Dudley Hanks wrote: I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Google helps. Examples: Search string: "" image stacking noise reduction "" http://www.flickr.com/groups/canonpo...7600370418804/ In this example, they show a high ISO shot but why use high ISO if you're on a tripod? I don't think this technique is very useful in snipped My point to Dudley was that in Google he can find many examples of NR techniques for a variety of purposes. -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI] gallery & rulz: http://www.pbase.com/shootin -- e-meil: Remove FreeLunch. -- usenet posts from gmail.com and googlemail.com are filtered out. |
#9
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Stacking for noise reduction
"Dudley Hanks" wrote in message news:FCtLk.3069$fF3.114@edtnps83... Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Thanks, Dudley If you just want to do stacking and do it easily then try a little program called "registax". Cheers. Pete |
#10
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Stacking for noise reduction
"Pete D" wrote in message ... "Dudley Hanks" wrote in message news:FCtLk.3069$fF3.114@edtnps83... Hi Folks, Not being an expert in Photoshop, I'm trying to figure out the basics. I've heard that, if one takes a number of identical pics and "stacks" them in Photoshop, one can obtain an end image with less noise. I'm wondering what steps are involved in this process so I can ask my son to give it a try. Appreciate all the help I can get. Thanks, Dudley If you just want to do stacking and do it easily then try a little program called "registax". Cheers. Pete Thanks for the heads up, Pete. I'll give it a try. Take Care, Dudley |
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