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Thread started 11 May 2007 (Friday) 09:22
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Noise reduction - unsharp mask - CS2

 
philmar
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May 11, 2007 09:22 |  #1

I have a question for the techie types here.
I notice that when I do a large batch process for noise reduction (using actions) in CS2 that the time involved is dramatically longer than it takes to do a batch action 'resize - unsharpen mask - convert color space- 8 bit mode- save as' (using the exact same batch side)
I am curious as to why CS2 noise reduction takes much much longer than all the other actions combined?
Is there something about noise reduction that requires more memory or CPU processing?


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In2Photos
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May 11, 2007 09:27 |  #2

Not sure which Noise Reduction you are using, the PS version built-in or a plug-in. But yes some just take more time then others.


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philmar
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May 11, 2007 10:35 as a reply to In2Photos's post |  #3

I'm using the CS2 built-in version.

Do plug-ins work faster? I have just spent the last week leaning sharpening - I don't think I have the energy to learn the intricacies and nuances of noise reductions right now:rolleyes:


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In2Photos
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May 11, 2007 10:44 |  #4

philmar wrote in post #3189289external link
I'm using the CS2 built-in version.

Do plug-ins work faster? I have just spent the last week leaning sharpening - I don't think I have the energy to learn the intricacies and nuances of noise reductions right now:rolleyes:

I don't think that plug-ins work faster. I use Noise Ninja and it takes some time to complete the task. Granted my PC isn't the fastest but I don't use it enough fro it to bother me. Noise was something I used to worry about but very rarely do I use it now.


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philmar
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May 11, 2007 12:20 |  #5

Anyone know why noise reduction takes longer than sharpening?

Perhaps because sharpening occurs only on pixels on/near edges whereas noise occurs in much larger areas like shadows forcing CS2 to do a lengthier set of pixel related mathematical calculatiuons?


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In2Photos
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May 11, 2007 12:47 |  #6

philmar wrote in post #3189856external link
Anyone know why noise reduction takes longer than sharpening?

Perhaps because sharpening occurs only on pixels on/near edges whereas noise occurs in much larger areas like shadows forcing CS2 to do a lengthier set of pixel related mathematical calculatiuons?

It has to be because of the algorythims. Try a more complicated sharpening tool like the TLR sharpening scripts and noise reduction will fly compared to it.


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Ronald ­ S. ­ Jr.
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May 26, 2007 10:35 |  #7

When I use The Noise Ninja plug-in with CS2 on a single shot, it takes around 3-5 seconds to complete the task. Multiply that out.


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Noise reduction - unsharp mask - CS2
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