Re: New Epson flatbed scanner...

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#81

From: HvdV
Date: Mon, 27 Feb 2006 20:57

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Don wrote:
> 

> 
> Indeed, by simply defocusing slightly the appearance of grain can be
> reduced. And, self evidently, an out-of-focus image has less image
> information/data than an in-focus image.
Some people in this NG have mentioned that some defocussing might be 
beneficial to reduce grain aliasing because it reduces the spatial frequency 
content of the image to better match the sampling rate of the scanner. This 
is assuming that you're dealing with fine grained films like Portra 160.
The sampling rate of that new Epson scanner might be high enough to 
completely capture the optical bandwidth, at least in one direction. On top 
of that, if it has a sample distance 2x smaller than it's CCD cell size then 
that is an anti aliasing filter in itself. Taken together we might see much 
less grainy results from that scanner. Hopefully the optics are good enough...

-- Hans

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Date: Mon, 27 Feb 2006 21:57:22 +0100
From: HvdV <nohanz@svi.nl>
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Subject: Re: New Epson flatbed scanner...
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