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Thread: Noise Reduction

  1. #1

    Default Noise Reduction

    any software to do that if my cam doesnt have the feature?

    remove the noise due to high iso levels

  2. #2
    qhelix
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    Default

    Personally I use Photoshop's Smart Blur function to get rid of some of the noise, although I'm not sure whether there's a better way to do it.

  3. #3

    Default

    thnx, i will try that out
    anyway can post some pic for comparism?
    before and after

  4. #4
    qhelix
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    Erm...off hand I don't have a noisy picture with me. Maybe you can post one somewhere and I'll see what I can do with it?

  5. #5

    Default

    Originally posted by qhelix
    Erm...off hand I don't have a noisy picture with me. Maybe you can post one somewhere and I'll see what I can do with it?
    u mean i just take one with high iso levels and post it here?

  6. #6
    qhelix
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    Yup

  7. #7
    Member
    Join Date
    Apr 2002
    Location
    Los Angeles
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    370

    Default

    the sticky thread on the oly forum has a s/w by mediachance that does just that.

  8. #8
    qhelix
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    If I'm not wrong the Hotpix applet and BlackframeNR only removes hot pixels, not noise.

  9. #9

    Default

    yah i am using that and it removes most of the hot pixels generated by my c-2100uz
    but for noise...........
    anyone help?

  10. #10
    qhelix
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    Actually there's a program called Neat Image.

    http://www.neatimage.com/

    It's a really great program, but the demo version only lets you save in .bmp format, so usually I just convert the BMP pic back into a JPG format and the quality is still excellent.

  11. #11

    Default

    thnx! i will try out that program
    anyway for conversion of .bmp to .jpg use wat s/w?
    PS?

  12. #12

    Default

    haiz.. the program very hard to use sia..

  13. #13
    qhelix
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    Not really...umm...I'll try to explain how to use it
    1. Load the picture.

    2. From the picture, just select a flat surface that shows a lot of noise eg. wall, ceiling, anything that's suppose to be just one colour. Try to make that selection as big as possible.

    3. Click on the Blue Ruler on the right panel.

    4. Click on the PLAY button on the top left hand corner.

    5. Wait for the program to finish processing the image and that's it!

    To convert BMP to JPG, most image editing programs can do that. Just open the BMP file, click File -> Save As.

    A box should appear asking for filename and extension, just make sure you select JPG for the extension then click SAVE. That's about it.

    Lemme know if there's anything you need me to clarify.

  14. #14

    Default

    oh thnx
    but when i play with it yesterday, the .bmp photo like got artifacts when zoomed in leh

  15. #15
    qhelix
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    Maybe you can send me the pic and I'll see whether I can fix it? Unless of course it's some personal thing then err....I dunno?

  16. #16

    Default

    nvm i try it out again 1st
    if really canot then i ask u help k

  17. #17

    Default

    the artifact is something like that


  18. #18
    qhelix
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    Here's a sample of what Neat Image did for me.


    From here, I guess you can see artifacts as well, but personally I think when you look at the whole picture it's not noticable, or at least it's much better than the noise IMHO

  19. #19
    qhelix
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    Or if you're willing to go that extra step you can use photoshop's smart blur to get this:


    What I did was use Neat Image first, then apply smart blur to fine tune the pic, although it may make the picture look a little more soft.

  20. #20

    Default

    how to apply the soft blur?
    or i heard about the gaussian blur or something like that
    where issit found?

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