13/11/2008, 03:16 AM
So I got bored and wanted to figure out which of these 2 great techniques I discovered in the past few days can reduce digital noise or image noise the best from photos.
NOISE!
Read if you don't know what I am talking about.
Normally one tries to lower noise in-camera by lowering ISO but that also increases shutter time and one cannot hand-hold for 10seconds and get a sharp image. So in those cases you need a tripod, but longer exposures also increase noise so there is a problem there.
So some shoot at higher ISOs then use a noise minimizing program to lessen it but these programs usually soften images and remove detail making the image less likable.
SO I found these techniques and tried them out and they turned out pretty well. RESULTS!
![[Image: 1946491bf8a0a349d.jpg]](http://globalsigalliance.com/forums/imagehosting/1946491bf8a0a349d.jpg)
And for those who can't see the image go HERE
EDIT: adding another image!
![[Image: 1946491c38b72cea7.jpg]](http://globalsigalliance.com/forums/imagehosting/1946491c38b72cea7.jpg)
So in my test I used my Canon 450d with 18-55 3.5-5.6 Lens and set the ISO to 100 and set to shoot in RAW to try and minimize noise in the first place.
Im my tests I used 2 techniques. The first being an 'averaging' technique that is done by taking many shots of the same place(can be done handheld) and merging them in a specific way to minimize noise)
The second I used a 2 exposure technique where I take a normal exposure then one that is 3 stops higher and also merge them in a specific way to get a good result.
Out of the 2 I prefered the second (2 exposure) one because it not only removed noise better and kept details well (such as textures) but also increased the images dynamic range! look at my results and you will see that it actually brought in some detail in the shadows over the original RAW file. But the first technique is more practical IMO because you can do it quickly and handheld then load files into stack in PS and merge. and theoretically if you merge enough shots together in this technique you can come up with a noise-less image, so the more shots you average, the less noise you get. An example of a really clean image with this technique is HERE It almost looks animated because it's so clean.
This is just a post and experiment done out of boredom and I got bored to get more crops out of the images so sorry if it ain't so acurate.
Links to tutorials on the techniques.
Averaging:
http://www.digitalartform.com/archives/2...noise.html
http://www.aecbytes.com/tipsandtricks/20...oshop.html
http://www.cambridgeincolour.com/tutoria...-noise.htm
2 exposure:
http://www.guillermoluijk.com/article/no...dex_en.htm
http://jtrujillo.net/qpix/
Sorry I didn't know where to post this so sorry if you don't benefit from it. The techniques are actually quite scientific in their approaches.
Might be of help to those who like to take pictures (MG(Chroma),Mehhakker?, .........Noone.)
NOISE!
Read if you don't know what I am talking about.
Normally one tries to lower noise in-camera by lowering ISO but that also increases shutter time and one cannot hand-hold for 10seconds and get a sharp image. So in those cases you need a tripod, but longer exposures also increase noise so there is a problem there.
So some shoot at higher ISOs then use a noise minimizing program to lessen it but these programs usually soften images and remove detail making the image less likable.
SO I found these techniques and tried them out and they turned out pretty well. RESULTS!
And for those who can't see the image go HERE
EDIT: adding another image!
So in my test I used my Canon 450d with 18-55 3.5-5.6 Lens and set the ISO to 100 and set to shoot in RAW to try and minimize noise in the first place.
Im my tests I used 2 techniques. The first being an 'averaging' technique that is done by taking many shots of the same place(can be done handheld) and merging them in a specific way to minimize noise)
The second I used a 2 exposure technique where I take a normal exposure then one that is 3 stops higher and also merge them in a specific way to get a good result.
Out of the 2 I prefered the second (2 exposure) one because it not only removed noise better and kept details well (such as textures) but also increased the images dynamic range! look at my results and you will see that it actually brought in some detail in the shadows over the original RAW file. But the first technique is more practical IMO because you can do it quickly and handheld then load files into stack in PS and merge. and theoretically if you merge enough shots together in this technique you can come up with a noise-less image, so the more shots you average, the less noise you get. An example of a really clean image with this technique is HERE It almost looks animated because it's so clean.
This is just a post and experiment done out of boredom and I got bored to get more crops out of the images so sorry if it ain't so acurate.
Links to tutorials on the techniques.
Averaging:
http://www.digitalartform.com/archives/2...noise.html
http://www.aecbytes.com/tipsandtricks/20...oshop.html
http://www.cambridgeincolour.com/tutoria...-noise.htm
2 exposure:
http://www.guillermoluijk.com/article/no...dex_en.htm
http://jtrujillo.net/qpix/
Sorry I didn't know where to post this so sorry if you don't benefit from it. The techniques are actually quite scientific in their approaches.
Might be of help to those who like to take pictures (MG(Chroma),Mehhakker?, .........Noone.)