Digital BW, The Print

I agree that the most important piece of information is that there are no
magic numbers, and am very grateful since, now that I can scan at 4000dpi, I
had taken the habit of downsampling to 360ppi before printing on A4.
On the other hand, I wouldn't disregard what Kennedy writes about the source
of the image:
 
>The problem of printing at higher resolutions has more to do with the
source of the >image than the capabilities of the printer.  In scanned
images, for example, film >grain can be highly accentuated due to the errors
at each dot placement, making the >print look substantially grainier than an
equivalent chemical print.

I'd like someone to elaborate on this: what does "higher resolutions" mean?
Higher than 200ppi? Or maybe it implies that some images would suffer from
being printed at, say, 480ppi rather than 300 because of their grain
structure? His description somehow reminds me of problems such as grain
aliasing in scanning.
 
Alessandro Pardi

----------------------------------------------------
One day I'll have a website.
Until then, you can see some of my work here:

http://www.photo.net/photodb/folder?folder_id=189247
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----------------------------------------------------


 
 
 

-----Original Message-----
From: Austin Franklin [mailto:darkroom@...om.com]
Sent: venerdì 22 marzo 2002 00.56
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: RE: [Digital BW] Image Resolution vs. Print Output Resolution


Hi Keith,

> To cut to the bottomline for those who inveterately turn to the last page
> first.. For current EPSON printers, the max usable and demonstrably better
> image resolution (when sent to the driver) is 720 dpi (assuming the image
is
> not being resized by the driver). I'll leave it to my friend to explain
why...

I believe there is a more important bottom line:

> There are no "magic numbers" - just throw whatever
> resolution you end up with at the printer and let the magic of
> stochastic dithering and spatial noise shaping sort it all out for you.
> :-)

Which is what I, and a number of others, have been saying.  Thanks for
bringing Kennedy's explanation into the fray.

Austin



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