Re: Re[3]: filmscanners: Film Scanners and what they see.

[Tony Sleep]

> Both phenomena depend on the use of a grid. But while aliasing
> is exemplified by forcing a pixel to be all one color (a binary
> sort if thing), the low pass effect has to do with diffraction 

That is *colour* aliasing, which is a special case of aliasing in general (luminance).

You don't need to resort to esoteric stuff like diffraction, both arise because the 
pixel is unable to record anything except average colour and luminance. Colour 
aliasing 
involves the RGB pixel-group's response to colour, as well as the individual pixels, 
but fundamentally it's the same thing.


Regards 

Tony Sleep
http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner info & 
comparisons