Re: Digicam

[Kennedy McEwen <rkm@xxxxxxxxxxxxxxxxxxxx>]

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
Yes, Socrates himself is particularly missed;
A lovely little thinker, but a bugger when he's pissed.
Python Philosophers
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