Archived posting to the Leica Users Group, 2004/07/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 1:48 PM +0100 7/2/04, Peter Dzwig wrote:
>The point of anti-aliasing is to smooth out "the jaggies", the
>jagged edges in digitised images caused by finite resolution. In
>theory with a large enough number of pixels in a camera you should
>be able to ignore the effects because the human eye wouldn't be able
>to resolve them. The need for anti-aliasing is a result of the
>artifacts introduced by the availability of a finite number of
>pixels to display an image in. For a standard monitor this number is
>1.25Mp and here anti-aliasing is necessary without doubt.
>
>It MAY be - and I say may because I don't know for certain - that at
>14 MP, up to certain "reasonable" magnifications the effects are
>either not noticeable or are swamped by other effects or are
>cancelled out by the effects of other algorithms, when the digital
>image is viewed or printed.
>
>Peter Dzwig
In the Kodak DCS SLR/n and c, the moir? artifacts are visible, just
where you expect them to be. Since a bayer pattern is used, you get
funny-coloured moir? patterns under some circumstances. The Kodak
software does not seem to be able to handle the results as well as an
anti-aliasing filter. Whether it makes any difference in real world
pictures is another matter.
--
* Henning J. Wulff
/|\ Wulff Photography & Design
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