Digital BW, The Print

Paul's last point is right-on, of course.  After seeing one of Tyler's
prints, it makes me think about pulling out the old 6x9, but then I remember
already having too little free time.
The only time I fret over this interpolation stuff is when I want to control
the pixilation rather than let the RIP do it.  Large interpolations should
have no significant sharpening done prior to upsizing, IMO, and addresses
Tyler's point of tonality.  That is the hardest part for me, sharpening
after upsizing.

Best regards,
John Moody

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of Paul Roark
Sent: Thursday, August 18, 2005 10:48 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: RE: [Digital BW] Genuine Fractals

The dpreview article mentioned below may have been where I saw a series of
images that compared the various methods.  I really could not see
significant difference among the top half of the approaches, which included
GF.  But, as mentioned before, the nature of the image makes a difference.

I use GF to up-sample images where I must.  It seems to avoid stair-stepping
and preserve sharp edges reasonably well. No doubt the state of the art has
advanced now; I have not tried s-spline but have seen dramatic comparisons
to bi-cubic.

My conclusion, however, is that these programs are just marginal
improvements to images that really needed to start as higher resolution
files in the first place.  There is no magic here and no substitute for good
initial information capture and scanning.  The programs cannot, in my
experience, manufacture fine detail that looks real.

Paul
www.PaulRoark.com




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