Noise

Discussion in 'Photography Beginners' Forum' started by Ptyler22, Sep 14, 2008.

  1. Ptyler22

    Ptyler22 TPF Noob!

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    What's the best way of getting rid of noise using pp without making the whole picture blurry? I would like to be able to make large prints from the pictures, if that makes a difference in your response. If you use photoshop what settings do you have the reduce noise feature set to?
    Thanks alot guys, and girls
     
  2. chrisburke

    chrisburke TPF Noob!

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    i've heard that gaussian blur helps.. but i dont think it will if your making large prints...because its a blur..
     
  3. Ptyler22

    Ptyler22 TPF Noob!

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    Ya, that helps quite a bit actually. Because the picture is a flower, so the background has some noise but not the flower so I can just use the eraser and undo the blur on the flower. Thanks
     
  4. Dao

    Dao No longer a newbie, moving up!

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  5. Ptyler22

    Ptyler22 TPF Noob!

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    I use mac, but they also have mac software, I'll try it out. Thanks
     
  6. chrisburke

    chrisburke TPF Noob!

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    whats the mac software yor gonna try out?
     
  7. manaheim

    manaheim Jedi Bunnywabbit Staff Member Supporting Member

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    Hey ptyler.

    There really isn't a way to get rid of noise without SOME degradation in the image. All algorythms are basically going to smooth out the colors, and that's going to lead to some occasional mis-steps.

    If it's actually NOISE (as in unexpected or undesirable variations of color on a pixel by pixel basis) then programs like NeatImage and NoiseNinja are your best bet as they will reduce the noise without the overly destructive effects of things like blur.

    Can you post an example of an image you have a problem with and include a 100% crop of it as well?

    Thanks!
     
  8. Ptyler22

    Ptyler22 TPF Noob!

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    This is the 100%, not a crop though just the whole picture 100%.
    http://image65.webshots.com/765/2/57/24/2182257240101958189lGePGb_fs.jpg
    http://rides.webshots.com/photo/2182257240101958189lGePGb?vhost=rides
    if the first link doesn't work then try this one, and click the picture and then click fullscreen
    And this is a reasonable size
    [​IMG]

    I don't know what half of this means but this is the FULL EXIF. This was shot at ISO 800 but I didn't think 40d's were supposed to be noisy like that even up to 1600. I noticed even at low ISO like 400 The reds are quite noisy, the 40d can't handle red, do you think it's a problem with my camera or are they all like that?

    File Name IMG_9741.JPG
    Document Type JPEG Image
    File Size 4416252 bytes
    Color Model RGB
    Depth 8
    DPI Height 72
    DPI Width 72
    Orientation 1
    Pixel Height 2592
    Pixel Width 3888

    Exif Properties

    Aperture Value 8.375
    Color Space 1
    Custom Rendered 0
    Date Time Digitized 2008:08:31 03:03:50
    Date Time Original 2008:08:31 03:03:50
    Exif Version 2.2.1
    Exposure Bias Value 0
    Exposure Mode 1
    Exposure Program 1
    Exposure Time 0.004
    Flash 16
    FlashPix Version 1.0
    FNumber 18
    Focal Length 105
    Focal Plane Resolution Unit 2
    Focal Plane X Resolution 4438.356
    Focal Plane Y Resolution 4445.969
    ISO Speed Ratings 800
    Metering Mode 5
    Pixel X Dimension 3888
    Pixel Y Dimension 2592
    Scene Capture Type 0
    Shutter Speed Value 8
    Sub-second Time 59
    Sub-second Time Digitized 59
    Sub-second Time Original 59
    White Balance 0

    GPS Properties

    GPS Version 2.2

    Canon Maker Notes

    AspectRatioInfo 0
    Camera Serial Number 1420703008
    Continuous Drive 5
    Flash Exposure Compensation 0
    LensModel EF28-135mm f/3.5-5.6 IS USM

    TIFF Properties

    Date Time 2008:08:31 03:03:50
    Make Canon
    Model Canon EOS 40D
    Orientation 1
    Resolution Unit 2
    X Resolution 72
    Y Resolution 72
     
    Last edited: Sep 15, 2008
  9. Ptyler22

    Ptyler22 TPF Noob!

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    The one in the link from the guy below your first post, it's called neat image. I haven't gotten it to work yet, but I'm workin on it.
     
  10. manaheim

    manaheim Jedi Bunnywabbit Staff Member Supporting Member

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    cut out a part that shows the noise and put that up at 100% so we can see. On my monitor, at that size, I don't really see much noise.

    I see some camera shake (looks like you should have used a faster exposure, or you may have missed the focus by just a touch) and/or and some areas that are underexposed (and underexposed areas can be a touch noisy even on LOW ISOs)
     
  11. Ptyler22

    Ptyler22 TPF Noob!

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    OK, heres the crop, and I lightened the dark areas a bit
    [​IMG]
     
  12. manaheim

    manaheim Jedi Bunnywabbit Staff Member Supporting Member

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    Yuppers, that's noisy alright. You can see that its far less so where it is exposed properly, so that's part of your problem, the rest may well be your ISO. It's not really THAT bad given the circumstances. Personally, I wouldn't worry too much about it. I can show you ISO 200 pictures I've taken where I can see slight noise in underexposed areas. Had you taken this from the other side I bet you wouldn't have seen even a tiny bit of noise.
     

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