Re: Digicam

[SKID Photography <skid@xxxxxxxx>]

Kennedy McEwen wrote:

> In article <3D03808A.5E1C7F20@bway.net>, SKID Photography
> <skid@bway.net> writes
> >Kennedy,
> >But now we are getting into that whole theoretical detail from lenses
> >and film vs.
> >the information contained in the grain, and the fact that the grain is
> >both random
> >(fractal) in arrangement and form whereas pixel arrangements are in a
> >grid.  So to
> >reproduce (in a scan) that random information, it takes a lot of rectangular
> >pixels.
> >
> That makes absolutely no difference to the conclusion - the fact is that
> the image detail on film has run out LONG BEFORE the rectangular
> pixelation becomes an issue at 8000ppi, let alone 40kppi.
>
> The random nature of the grain may cause aliasing issues if the 8000ppi
> scan is taken without any oversampling, since a square pixel has a
> resolution well beyond its closest packed sampling density, as I have
> discussed on this forum on many occassions, but that is another matter
> and easily overcome with suitable scanner design - indeed it is
> difficult to avoid in such high resolution devices.
>
> Film grain is NOT the image, merely the "bricks" that the image is
> constructed from - and you don't need to resolve the bricks to see the
> wall.
> --
> Kennedy

But I think the grain *is* the image, so we agree to disagree.

Harvey FErdschneider
partner, SKID Photography, NYC

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