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Thread: chromatic aberration paper mistake?

  1. #1
    Junior Member Newbie
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    chromatic aberration paper mistake?

    Hi,
    When I looked at the physical approach of Nvidia's paper, I was very confused about one part of the equation:

    sqr( I - n(1-(N.I)) )

    N and I are vectors.

    How can you take the square root of a vector,
    and how can you subtract a scalar from a vector?
    AFAIK it is not possible.
    Should there be a 1 instead of the first I ?

    -FA

  2. #2
    Advanced Member Frequent Contributor
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    Re: chromatic aberration paper mistake?

    What paper? I don't mind this out.

  3. #3
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    Re: chromatic aberration paper mistake?

    Hi,
    I mean this paper: http://developer.nvidia.com/object/c...berration.html

    The equation for the refraction vector seems to be false (Page 12).

  4. #4
    Junior Member Newbie
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    Re: chromatic aberration paper mistake?

    There was a slight error in the equation. If you take a look at this web page,

    http://www.cfxweb.net/modules.php?na...rticle&sid=660

    you'll see the correct equation.

    The I vector under the radical should have been a 1.

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