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Thread: Free Noise Reduction Software....

  1. #1
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    Default Free Noise Reduction Software....

    Someone asked be about noise reduction software recently...

    While surfing I came across this :
    http://www.imagenomic.com/index.asp

    The community version is FREE!

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    Maybe some one can start a thread to Poll the type of noise reduction software used.
    Also can let us know if its free & limitations of the free software.
    Dreaming... 14mm f2.8, 16-35 f2.8 mkII, 85 f1.2 mkII

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    Quote Originally Posted by Zplus
    Someone asked be about noise reduction software recently...

    While surfing I came across this :
    http://www.imagenomic.com/index.asp

    The community version is FREE!
    Downloaded itz...CooL...maybe get the Pro Ver.

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    Quote Originally Posted by dzulhjdzaid
    Downloaded itz...CooL...maybe get the Pro Ver.
    Yeah! Its pretty nifty and its free!

    Think its quite comparable to those you pay for. Only this is that the free version only does 8bit. So... this should be the last step in your workflow.

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    Quote Originally Posted by Zplus
    Yeah! Its pretty nifty and its free!

    Think its quite comparable to those you pay for. Only this is that the free version only does 8bit. So... this should be the last step in your workflow.
    Ok, so i need a little help in this ...

    Currently my workflow is
    1. Convert RAW to JPG with no sharpening, aRGB color space
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size
    3. Apply USM

    Where does the NR step come in - before or after USM?

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    Quote Originally Posted by Darren
    Ok, so i need a little help in this ...

    Currently my workflow is
    1. Convert RAW to JPG with no sharpening, aRGB color space
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size
    3. Apply USM

    Where does the NR step come in - before or after USM?
    Hmmm.. I would place the NR before USM.
    USM will actually increase noise.
    Also USM is not affected by 8bit images.

    So in your case using the free noise reduction which only handles 8bit:
    1. Convert RAW to JPG with no sharpening, aRGB color space - 16bit
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size - 16bit
    3. Convert to 8bit
    4. NR 8bit
    5. Apply USM 8bit

    If the NR software can handle 16 bit:
    1. Convert RAW to JPG with no sharpening, aRGB color space - 16bit
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size - 16bit
    3. NR 16bit
    4. Apply USM 16bit

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    ClubSNAP Admin Darren's Avatar
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    Quote Originally Posted by Zplus
    Hmmm.. I would place the NR before USM.
    USM will actually increase noise.
    Also USM is not affected by 8bit images.
    This is a bit contradictory - if USM increase noise, wouldn't it be better to run NR after USM?

    So in your case using the free noise reduction which only handles 8bit:
    1. Convert RAW to JPG with no sharpening, aRGB color space - 16bit
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size - 16bit
    3. Convert to 8bit
    4. NR 8bit
    5. Apply USM 8bit

    If the NR software can handle 16 bit:
    1. Convert RAW to JPG with no sharpening, aRGB color space - 16bit
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size - 16bit
    3. NR 16bit
    4. Apply USM 16bit
    ahem ... if i am not mistaken ... JPEG only support 8-bit color depth ... only TIFF allows 16-bit

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    Quote Originally Posted by Darren
    This is a bit contradictory - if USM increase noise, wouldn't it be better to run NR after USM?
    No. The reason is this.... if you USM first... You would have introduced new noise data from USM. And USM will emphasis the noise already there. Remember that USM really increase contrast of adjacent pixels thro some algorithm, theoretically. This means that the noise would be enhanced. Then the NR would have to denoise the inherent noise plus new noise from USM.

    If you NR first, you'd have a cleaner image to do USM.

    You can try this out and see the diff. If you USM a noisey image, it becomes even more noisier.

    Quote Originally Posted by Darren
    ahem ... if i am not mistaken ... JPEG only support 8-bit color depth ... only TIFF allows 16-bit
    OOps! You're right..... Cut and pasted hahaha!


    Here is the correct one:
    If the NR software can handle 16 bit:
    1. Convert RAW to PSD with no sharpening, aRGB color space - 16bit
    2. Crop in PS-CS to 1800x1200@300dpi for 4R size - 16bit
    3. NR 16bit
    4. Apply USM 16bit
    Last edited by Zplus; 30th September 2004 at 01:32 PM.

  9. #9

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    Sorry for this question but that is USM?

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    Quote Originally Posted by dewy
    Sorry for this question but that is USM?
    Hi dewy, in this case USM = unsharp mask.
    If you are talking about canon lens, USM = ultrasonic motor...

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