Adobe RAW plugin White Point problem

Discussion in 'Digital Photography' started by Ted Rogers, Sep 3, 2003.

  1. Ted Rogers

    Ted Rogers Guest

    I posted this question over on the Photoshop group and got no reply - I
    wonder if anyone here would know the answer to what might well be a daft
    question :)

    I have just gone through the Adobe Raw plugin tutorial whereit said to set
    the white point by using the White Balance Tool. Fine so far. This value
    (they say)should be a 3/4 grey value selected somewhere in the image.

    My question is, how do I accurately select a 3/4 grey portion of the image?
    Does a 3/4
    grey have an RGB value?

    Thanks very much

    Ted
    Canon 10D, Photoshop 7.1, Adobe RAW plugin, VC and bar.
     
    Ted Rogers, Sep 3, 2003
    #1
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  2. Ted Rogers

    Kingdom Guest

    "Ted Rogers" <> wrote in
    news::

    > I posted this question over on the Photoshop group and got no reply -
    > I wonder if anyone here would know the answer to what might well be a
    > daft question :)
    >
    > I have just gone through the Adobe Raw plugin tutorial whereit said to
    > set the white point by using the White Balance Tool. Fine so far. This
    > value (they say)should be a 3/4 grey value selected somewhere in the
    > image.
    >
    > My question is, how do I accurately select a 3/4 grey portion of the
    > image? Does a 3/4
    > grey have an RGB value?
    >
    > Thanks very much
    >
    > Ted
    > Canon 10D, Photoshop 7.1, Adobe RAW plugin, VC and bar.
    >
    >
    >


    1/4 of 256 = 64

    x3 = 192

    3/4 gray rgb = 192 192 192
     
    Kingdom, Sep 3, 2003
    #2
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  3. Ted Rogers

    Ted Rogers Guest

    "Kingdom" <> wrote in message
    news:Xns93EBBD89C673Fkingdomofwizdom@194.117.133.134...
    > "Ted Rogers" <> wrote in
    > news::
    >
    > > I posted this question over on the Photoshop group and got no reply -
    > > I wonder if anyone here would know the answer to what might well be a
    > > daft question :)
    > >
    > > I have just gone through the Adobe Raw plugin tutorial whereit said to
    > > set the white point by using the White Balance Tool. Fine so far. This
    > > value (they say)should be a 3/4 grey value selected somewhere in the
    > > image.
    > >
    > > My question is, how do I accurately select a 3/4 grey portion of the
    > > image? Does a 3/4
    > > grey have an RGB value?
    > >
    > > Thanks very much
    > >
    > > Ted
    > > Canon 10D, Photoshop 7.1, Adobe RAW plugin, VC and bar.
    > >
    > >
    > >

    >
    > 1/4 of 256 = 64
    >
    > x3 = 192
    >
    > 3/4 gray rgb = 192 192 192


    Lovely - thanks!

    Ted
     
    Ted Rogers, Sep 3, 2003
    #3
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