the difference between raw and tiff format

Discussion in 'Digital Cameras' started by jamie, Nov 11, 2004.

  1. jamie

    jamie Guest

    Hi there

    Some digicams have tiff support and some has raw support for images
    what is difference between these two formats.

    Thanks in advance

    Jamie
     
    jamie, Nov 11, 2004
    #1
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  2. Your camera processes the data to make a photograph that you see. It adjusts
    for its best guess (maybe with your guidance) of the color temperature of
    the light, it sharpens, it adjusts contrast, size...etc. One of the things
    it can do is make a Tiff file that is large or a Jpg file that is smaller
    but gets that way by tossing out some of the information.

    You can choose to have the processing that the camera performs delayed. You
    can, with the right plug-ins do that sort of thing in Photoshop or some
    other software. By doing it then you can make the decisions on how much
    adjusting you want to give each image. You might decide to do it in a couple
    of different ways. And...you are doing it with more information to start
    with than if you were working on a Jpg....more bit depth.

    I started using the RAW data a few months ago as I was trying to squeeze a
    little more quality out of my 4mp camera. I can use the histogram to limit
    the amount of contrast on a sunny day...or expand a flat scene. It really is
    nice....but extra work.

    Also of note....Adobe is not distributing the Adobe Digital Negative
    program. It saves your proprietary RAW data in a generic sort of file that
    is more likely to be readable in the distant future...but its still
    unprocessed and holds all the data ....and its much smaller than a RAW.


    "jamie" <> wrote in message
    news:cn098m$k5$...
    > Hi there
    >
    > Some digicams have tiff support and some has raw support for images
    > what is difference between these two formats.
    >
    > Thanks in advance
    >
    > Jamie
    >
    >
     
    Gene Palmiter, Nov 11, 2004
    #2
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  3. jamie

    sid derra Guest

    "Gene Palmiter" <> wrote in message
    news:DxOkd.2960$Bj2.2876@trndny01...
    > Also of note....Adobe is not distributing the Adobe Digital Negative
    > program.


    just cos i am a little confused by this last paragraph: do you mean "is
    _not_" or "is _now_ distributing"?

    sid
     
    sid derra, Nov 11, 2004
    #3
  4. "jamie" <> wrote in news:cn098m$k5$1@ctb-
    nnrp2.saix.net:

    > Some digicams have tiff support and some has raw support for images
    > what is difference between these two formats.


    The RAW format is the (almost) RAW digitized data from the sensor.
    There is only some noise reduction made. For most cameras, it is
    also a Bayer pattern format, i.e. it is really like an ordianry B&W
    image where 50% of the pixels are green, 25% blue and 25% red. RAW
    image format is propiarety, i.e. not standardized. RAW images might,
    or might not, be losslessy compressed. They might be any number of bits
    per pixel, e.g. 10 or 12. RAW format is the most compact format for
    storing pictures that still contain all information. The image is
    useless without doing an interpolation step. This step is in principle
    identical for all Bayer cameras, but it is almost always made with
    the manufacturers own conversion program or at least plugin.

    TIF is a standard format that can contain e.g. RGB images. It is
    usually 8 or 16 bit, where 8 bit uses gamma compression of the
    dynamic range and 16 bit is normally linear. A TIF image is much
    larger than a RAW image. It is also an interpolated version of Bayer
    images - i.e. a useful image - but with some losses. Losses that
    future RAW to RGB converters might be able to minimize. TIF images
    might, or might not, be losslessy compressed.



    /Roland
     
    Roland Karlsson, Nov 11, 2004
    #4
  5. That should read "Now"...sorry...tired fingers and eyes.


    "sid derra" <ng_NO_@_SPAM_emolife.net> wrote in message
    news:...
    > "Gene Palmiter" <> wrote in message
    > news:DxOkd.2960$Bj2.2876@trndny01...
    > > Also of note....Adobe is not distributing the Adobe Digital Negative
    > > program.

    >
    > just cos i am a little confused by this last paragraph: do you mean "is
    > _not_" or "is _now_ distributing"?
    >
    > sid
    >
    >
     
    Gene Palmiter, Nov 11, 2004
    #5
  6. jamie

    sid derra Guest

    "Gene Palmiter" <> wrote in message
    news:nzSkd.4024$jP4.3937@trndny07...
    >
    > That should read "Now"...sorry...tired fingers and eyes.


    i hear ya... its 5am here and i have been studying for 14 hours straight.
    so - time to get some rest for me as well.

    rock on.
     
    sid derra, Nov 12, 2004
    #6
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