RAW vs JPEG comparison for D70

Discussion in 'Digital SLR' started by paul, Jan 16, 2005.

  1. paul

    Roger Guest

    Yes it does.
    If it was a long exposure it did. If short, it did not.
    Dark Frame Subtraction is not the same as software noise reduction and
    is an entirely different process. It removes the individual pixels of
    noise. How it handles replacing each of those individual pixels can
    be done a number of ways.

    The simplest would be to take each pixel removed and replace it with
    an average of the 8 surrounding pixels. It could also perform a fast
    Fourier transform, but probably doesn't have the computing power.
    comparing RAW and JPGs in apples and oranges. I'd at least compare
    RAW and TIFFs.

    At normal exposures and ASA you shouldn't even be able to see the
    difference. Dark frame subtraction is for long exposures.
    Sharpening does not get rid of noise! It emphasizes differences and
    that means it will emphasize the noise.

    But...pasting the RAW on top of the jpg? Why do things the hard way?
    If you have RAW, convert to TIFF and do your processing. THEN change
    it to JPG if you feel the need.

    Working with out and out RAW images is not for the faint of heart and
    can be discouraging for the beginner. If the information is there as
    it is with the NEF, photoshop CS will give you control of the
    conversion to TIFF and a real head start to saving a lot of work..
    Noise reduction does that.
    It's a steep learning curve.
    Nikon Capture is not one of the best programs out there for one.
    If the noise is due to long exposure you aren't likely to find a
    better way of elimination than dark frame subtraction.

    It just occurred to me to ask if you are shooting in the NEF/JPG mode
    where you get both an NEF and JPG? If so those are not full resolution
    JPGs.

    Roger Halstead (K8RI & ARRL life member)
    (N833R, S# CD-2 Worlds oldest Debonair)
    www.rogerhalstead.com
     
    Roger, Jan 19, 2005
    #21
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