Help! why does this happen

Discussion in 'Photography Beginners' Forum' started by alarionov, May 18, 2010.

  1. alarionov

    alarionov TPF Noob!

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    see the weird lines in the sky area? Why does this happen. I am using photoshop elements, desat, some blur, and some brown.

    [​IMG]

    [​IMG]
     
  2. alarionov

    alarionov TPF Noob!

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    thanks just googled it, looks like its might be the curves. Dont suppose you know of a way to fix without going back to scratch?
     
  3. Bitter Jeweler

    Bitter Jeweler Been spending a lot of time on here!

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    I selected the sky and blurred it away.
    It's totally salvagable.

    Odd that it did it only in the sky, and looking through your stream, it doesn't appear in any other photos.
     
  4. KmH

    KmH Helping photographers learn to fish Supporting Member

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    It's called "banding" too.

    A JPEG image has an 8-bit color depth. Only 256 colors can be represented by 8-bits.

    There are not enough colors to faithfully render the gradual tonal transitions in the sky and you see a line where each transition to the next of 256 colors is.

    RAW captures have a 12-bit (4,096 colors) or 14-bit (16,384 colors) color depth which is why so many shoot RAW mode.

    Color depth - Wikipedia, the free encyclopedia
     
    Last edited: May 18, 2010
  5. reznap

    reznap No longer a newbie, moving up!

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    Jpeg compression..

    Make sure you shoot on high quality jpeg and when you save your photo in Photoshop make sure the quality is at least a 9... 12 is max, I save my jpg's at 11.

    EDIT: ^ Also what KMH said - but if you save a nicely edited RAW image as a low quality jpg you'll get this end result too.

    It's in the hillside too on #1... These are pretty severely damaged
     
  6. AnaBo

    AnaBo TPF Noob!

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    FYI when you print, the banding is less noticeable in glossy, satin or luster paper. matte will show every single line. but I mean actual matte not the luster you get at a one hour place.

    Just something to keep in mind if you are printing, sometimes you don't notice the banding till you print.
     
  7. vtf

    vtf No longer a newbie, moving up!

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    me too:thumbup:
     
  8. Derrel

    Derrel Mr. Rain Cloud

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    It's posterization caused by excessively adjusting the images in post processing. There's an acceptable degree of adjustment where tones and colors and values are not stretched too far--and if you go beyond that degree of manipulation, you'll get posterization. Shooting in-camera JPEG is the worst, since the files out of the camera can not stand up to a high degree of adjustment; RAW captures, done in either 12-bit or 14-bit RAW have a significantly greater amount of post-processing adjustment that can be applied before posterization begins.
     
  9. Big

    Big TPF Noob!

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    Well, since they've answered your question, nice shots! haha. I like the contrast
     
  10. EmmaIam

    EmmaIam TPF Noob!

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    Go back to scratch, processing an over processed image leaves you with the ability to show a 'small' image, and yield a low grade print.

    Em
     
  11. creisinger

    creisinger TPF Noob!

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    KmH and Derrel are right.

    Especially skies show this phenomenon quite often. If you've seen it before you can notice it in many pictures once you know what you are looking for. It may not be that apparent but it's something digital cameras fight with due to the bit-depth they are restricted to.

    It happens to me sometimes that I can see banding in 16/12 bit images but once I convert them to 8-bit, the banding is gone.

    In any case, try to start editing your images in 12/16 bit, it will give you more leeway when editing.
     
  12. alarionov

    alarionov TPF Noob!

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    Wow! awsome information guys, thanks. I think I might go back to the RAW file and start again.

    thanks
     

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