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Underwater Photography

Discussion in 'Photography' started by sagteck, Nov 14, 2010.

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  1. sagteck

    sagteck Member

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    Hey all! I've been using a Gimp for a couple of years now and thought I'd post what I'm doing with it recently. If anyone is curious I could explain how I corrected them.

    I used a crummy film disposable camera which had a red filter built into it.

    Before
    [​IMG]
    After
    [​IMG]

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    SAM
     
  2. David Wood

    David Wood Moderator Staff Member

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    Not bad, a little strong for my taste but nice color correction. Now you should clean up the noise using GreyC or G'Mic :)
     
  3. sagteck

    sagteck Member

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    What do ya mean by strong? jc.
     
  4. David Wood

    David Wood Moderator Staff Member

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    The colors are strong and oversaturated, especially in the first image. It should be less saturated and have a more aqua green color. :)
     
  5. k.anderson3454

    k.anderson3454 New Member

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    The pictures are amazing. You capture pictures well.
     
  6. sagteck

    sagteck Member

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    Thanks guys. And thanks Maffe811 for putting them in spoiler tags. I didn't think gimper had them.

    @David: Yea I tried making them as close to surface colors as I could but due to the low quality camera and the unintended effect the flash had on the red filter I couldn't. I didn't even know it had a red filter until developing the pics.

    Here's a couple more pictures of fish in coral.

    [​IMG]

    [​IMG]

    I've got a new 10 megapixel camera now with an underwater housing (up to 200 ft depth!). So in the future you'll be seeing much higher quality pictures. Here's a picture taken with the new camera (image has been highly reduced in resolution by facebook).

    [​IMG]

    Anybody know any good noise reduction tutorials? I've already got the G'MIC plugin but I've only used it for anisotropic smoothing (under enhancement) for cartoon images and such (anime). I couldn't figure out how to reduce the noise.
     
  7. virtualTune

    virtualTune Active Member

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    especially on #4 and the last one imo
     
  8. David Wood

    David Wood Moderator Staff Member

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    You use the same filter. After you're done with the color correction make a 'new from visible' layer on top of the other layers and run the filter, increase the Anisotropy to the max, and if necessary change the noise size until as much noise as possible is gone from the preview, Hit OK and when the filter is done processing lower the layer's opacity to something between 70 and 90, the filter is so powerful the results will look a little fake if you don't change the opacity. Now merge all the layers together and you should have a much cleaner image. And always save as png to avoid jpg compression artifacts. :)
     
  9. sagteck

    sagteck Member

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    Anisotropic smoothing
    Before
    [​IMG]
    After
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    Anisotropic smoothing + Hue/Saturation adjustment
    Before
    [​IMG]

    After, multiplied orange color, subtracted yellow color
    [​IMG]

    After, multiplied orange color, multiplied yellow color
    [​IMG]

    For the second one I had to go into quickmask, create a gradient selection using a square shape, and deleted the outer edges of the anisotropic smoothing layer. That's because the edges of the image got really funky in the smoothing process.

    Please tell me your thoughts, would you add/subtract any colors from this? Remember that my camera was already using a red filter and I had to subtract red to get the second one to it's current state (due to reflection of particles in the water from camera flash).

    Any further comments/critiques are greatly appreciated because this is my first time working with Photography (and esp underwater photog).
     
  10. David Wood

    David Wood Moderator Staff Member

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    That does look better, but there is still a lot of noise, you may have to run the filter several times. :)
     
  11. Maffe811

    Maffe811 The forum pet Staff Member

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    No problemo!
    Thats what im here for! :)
     
  12. sagteck

    sagteck Member

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    I created a tutorial on gimp-tutorials.net... <a class="postlink" href="http://gimp-tutorials.net/node/1620" onclick="window.open(this.href);return false;">http://gimp-tutorials.net/node/1620</a>

    But when I log out I can't read it. Is there a mod approval system in effect?
     
  13. David Wood

    David Wood Moderator Staff Member

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    Yes I believe so.
     
  14. sagteck

    sagteck Member

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    Is it still maintained? The last user submitted tut is 09/12/2009.

    edit: scratch that, 05/03/2010 is latest. So probably is. :question:
     
  15. Scrapie

    Scrapie Member

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    Ah :D Didnt know we can log in there xD Ehm, david? do you have the rights to publish tutorials?
     
  16. David Wood

    David Wood Moderator Staff Member

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    No, Gimp-tutorials is separate from Gimper.
     
  17. Maffe811

    Maffe811 The forum pet Staff Member

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    ahh... crap
     
  18. jimfaster

    jimfaster New Member

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    Hello, I'm looking for photographers who want to make a model of underwater photography. Everyone? Do give me a Buzz!
     
  19. virtualTune

    virtualTune Active Member

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    Locked! (@ jim, that makes no sense!)
     
  20. Arzoroc

    Arzoroc Moderator Staff Member

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    I just think he was a spammer and Maffe/Rod/I/someone changed his signature to "Take care of yourself"... anyway, re-locked.
     
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