Can you tell the difference?

Discussion in 'Graphics Programs and Photo Gallery' started by crimbfighter, Mar 16, 2019 at 9:06 PM.

  1. crimbfighter

    crimbfighter TPF Supporters Supporting Member

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    I am playing with more options for processing images because I am playing around more with my telescope. I have been playing with using a program called Autostakkert, which processes individual frames from a video file. It is useful because it can compensate for some atmospheric distortion by stacking frames. I played with it a bit using my D500 and Nikon 200-500 with the moon tonight to see if there was a noticeable difference between editing a stacked image vs. a single exposure. I'm curious to see which, if either, is preferred. The first is using a single image and the second is using a stacked image from video frames. Can anyone tell a difference or have a preference?

    1.
    Moon Processing Test-.jpg

    2.
    Moon Processing Test--2.jpg


     
    Last edited: Mar 16, 2019 at 9:34 PM
  2. zombiesniper

    zombiesniper Furtographer Extraordinaire! Supporting Member

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    They look identical to me. Including the two red pixels on the upper left side of the moon in the black.
    Are you sure these are different images?
    If so, I can't tell a difference.
     
  3. crimbfighter

    crimbfighter TPF Supporters Supporting Member

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    Haha, I'll have to double check... I may have accidentally selected the same image twice...
     
  4. crimbfighter

    crimbfighter TPF Supporters Supporting Member

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    Fixed.. I accidentally selected the same attachment twice.
     
  5. zombiesniper

    zombiesniper Furtographer Extraordinaire! Supporting Member

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    There seems to be a bit more noise in the first image.
    Second appears to have same quality with less noise.

    Interesting.
     
  6. crimbfighter

    crimbfighter TPF Supporters Supporting Member

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    That's actually the same thing I noticed, too. I dont thing the stacked image resolved more detail, but it seemed to do it with less noise and maybe a tad more dynamic range, especially in the mid tones. Stacking is a common technique used in astrophotography, and the stacking process reduces noise quite a bit.
     
  7. zombiesniper

    zombiesniper Furtographer Extraordinaire! Supporting Member

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    I normally stack in photoshop.
    I'd love to see the difference between Autostakkert and Photoshop but it's a Windows only software.
     
  8. Designer

    Designer Been spending a lot of time on here!

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    I see higher contrast and definition in the stacked version.
     
  9. otherprof

    otherprof TPF Supporters Supporting Member

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    I agree with Designer. The second one appears to have higher contrast. But why not try this again without letting us know which image is stacked until the comments about differences are in?
     
    • Agree Agree x 1
  10. Derrel

    Derrel Mr. Rain Cloud

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    The differences seem rather slight to me...neither is markedly different than the other...but,now,on Visit #3, the first appears "crisper"...
     
    Last edited: Mar 17, 2019 at 3:20 PM
  11. adamhiram

    adamhiram No longer a newbie, moving up!

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    Agreed. I see more noise in the first image, but it also looks sharper. The 2nd image looks like too much noise reduction was applied at the cost of some detail. Have you tried the stacking method using still frames instead of video frames?
     
    • Agree Agree x 1
  12. DaPOPO

    DaPOPO No longer a newbie, moving up!

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    The second is a little lighter and crisper.
     

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