Post Processing Challenge

Discussion in 'Digital SLR' started by Ken Tough, May 22, 2005.

  1. Ken Tough

    Ken Tough Guest

    I'm a newcomer to digital post-processing, and really need to
    get the hang of curve adjustments, saturation, cropping etc.

    A bit like the "Shoot In", perhaps there could be a "post
    processing challenge" where one original is made available and
    people can try and make the best of it. For example, I've tried
    various crops and contrast/saturation/sharpness edits on a shot,
    and came up with this:

    http://www.pbase.com/k_j_tough/image/43692731

    I'm just using an LCD monitor, and nothing is calibrated and I
    don't do anything with color spaces, so I can't imagine it looks
    reasonable everywhere. The shot was taken just before sunset,
    and sorry no WB reference.

    Anyone want to take a stab? Here's the original:
    www.objectech.co.uk/ken/ppc/DSC_0001.NEF

    I assert my rights to the image (and derivatives). For what it's worth.
     
    Ken Tough, May 22, 2005
    #1
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  2. Ken Tough napisa³(a):
    My FF has shown that the files is only 1.9mb? something wrong or...?
     
    Marek M. \rogus\, May 22, 2005
    #2
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  3. Ken Tough

    Robert Brace Guest

    Ken:
    The NEF file is coming across as a TIF download.
    Is the original NEF not available, or did you already convert to the TIF
    format?
    Bob
     
    Robert Brace, May 22, 2005
    #3
  4. Ken Tough

    Ed Ruf Guest

    This is corrupt, Capture can't open it. As previously mentioned it's too
    small which would tend to indicate problems with the upload.
     
    Ed Ruf, May 22, 2005
    #4
  5. Ken Tough

    Robert Brace Guest

    Ken:
    As mentioned, the file must be corrupt. PSCS won't complete the opening
    of the TIF, indicating an "unexpected end of file indicator" was
    encountered.
    Bob
     
    Robert Brace, May 22, 2005
    #5
  6. Ken Tough

    Ed Ruf Guest

    That's probably the imbedded thumbnail you are detecting.
     
    Ed Ruf, May 22, 2005
    #6
  7. Ken Tough

    Robert Brace Guest

    Ed:
    You're probably right, I hadn't thought of that. That would account for
    the small size shown in the PSCS browser as well. How would one get at the
    "full file" then. I actually went to the site indicated in the URL and
    accessed the file directly -- still showing as as a TIF.
    If the full NEF were zipped into a ZIP file, that would make things
    simpler (provided the NEF wasn't corrupt).
    Bob
     
    Robert Brace, May 22, 2005
    #7
  8. Gene Palmiter, May 22, 2005
    #8
  9. Ken Tough

    Ed Ruf Guest

    Are you downloading it directly into PS? PS would then recognize the
    thumbnail which is tif. I saved it to my hard drive and it's only 1.9MB and
    I can't open it in the latest version of Nikon Capture. This leads me to
    believe it is only a partial file.
    I don't see how you buy anything by this.
     
    Ed Ruf, May 22, 2005
    #9
  10. Ken Tough

    DoN. Nichols Guest

    And "dcraw" converts about the top 1/4 of the image, and then
    fails.

    And the contrast seems quite low in the part which is visible.
    (Though xv will look at the JPEG thumbnail in the front, and it suggests
    that there is more contrast down in the area which I can't see.

    And note that the unix "file" command on Solaris identifies all
    ..NEF files as "TIFF file, big-endian". The TIFF format is used as a
    wrapper around the RAW data, allowing for the embedding of a .jpg
    thumbnail and the EXIF data.

    FWIW -- I note that the camera is at the 1.02 version -- a
    couple of flash ROM upgrades behind.

    As for using a LCD monitor -- it can be quite good, depending on
    your system.

    My Sun ULTRA-2 needs for me to reset the gamma from the default
    (for CRTs) to 1.0, and after that, a bit of tweaking of brightness and
    contrast with a web-based grayscale for the purpose, and things are
    quite nice.

    Some systems might adjust the gamma automatically, if they
    detect a LCD monitor -- and others may have no way to adjust it at all.
    My earlier framebuffer (SunSpeak for graphics card) had no adjustment,
    and looked rather washed out with most images.

    Good Luck,
    DoN.
     
    DoN. Nichols, May 22, 2005
    #10
  11. Ken Tough

    Paul Furman Guest


    Same with irfanview. With an interesting bayer pattern effect where it dies:

    http://www.edgehill.net/incomplete-nef-700-percent.jpg
    700% enlarged crop, upper brown is the low contrast image
     
    Paul Furman, May 22, 2005
    #11
  12. Ken Tough

    DoN. Nichols Guest

    O.K. I hadn't zoomed in to check out that. It is just at the
    upper left-hand corner of the missing area?

    And -- I also see diagonal brown lines (actually magenta, brown,
    yellow in detail) with similar patterns in them running from lower-left
    to upper right through the rest of the missing area. Do you see that,
    too? Or is your Irfanview showing something different for the rest of
    the image? (It would not be unexpected for the programs to treat
    missing areas differently, as they may use slightly different
    algorithms.)

    Enjoy,
    DoN.
     
    DoN. Nichols, May 22, 2005
    #12
  13. Ken Tough

    Paul Furman Guest


    O.K. I hadn't zoomed in to check out that. It is just at the
    upper left-hand corner of the missing area?[/QUOTE]


    Yes it's a fairly small area at the left edge. Most of the blank part is
    that off-white.


    Not sure. I don't think I see anything but the checkerboard fading off.
     
    Paul Furman, May 23, 2005
    #13
  14. Ken Tough

    Robert Brace Guest

    Ed:
    I'm not sure I buy anything but knowing I will be able to download a ZIP
    file cleanly to the desktop. I then can unpack it to where I like and then
    access the contained NEF file without worrying about the TIFF file within
    the NEF file confusing the issue.
    I was not downloading directly into PS. I was trying to do as I
    indicate in the preceeding paragraph (except with the NEF file directly).
    It must be the file corruption (or a partial file) causing the
    difficulty.
    Bob
     
    Robert Brace, May 23, 2005
    #14
  15. Ken Tough

    RichA Guest

    RichA, May 23, 2005
    #15
  16. Ken Tough

    Ken Tough Guest

    Download must have failed.

    I have to go out of town right now, but will try and update
    it in a little while!

    sorry!
     
    Ken Tough, May 23, 2005
    #16
  17. Ken Tough

    DoN. Nichols Guest

    O.K. Here is what I got -- in full, taking the white balance
    information which was in the original file:

    http://www2.d-and-d.com/EXAMPLES/strange-conversion/DSC_0001.jpg

    (full size, so it will be a slow download.)

    And, apparently, they *do* give different behavior.

    Enjoy,
    DoN.
     
    DoN. Nichols, May 23, 2005
    #17
  18. Ken Tough

    Ken Tough Guest

    Ken Tough, May 23, 2005
    #18
  19. Ken Tough

    Pete D Guest

    Ken,

    An attempt posted in alt.photos.binaries.originals
     
    Pete D, May 23, 2005
    #19
  20. Marek M. \rogus\, May 23, 2005
    #20
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