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Digital BW, The Print

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Upsize Report - Qimage vs PS-CS

2006-01-02 by Clayton Jones

Hello All,

The reason I asked about resizing programs last week is that during my
trip to Death Valley National Park last year I took lots of low res
pics (1.2mp) with a pocket digicam, along with my "serious" pics with
an 8mp camera and tripod.  The intention was to simply document the
trip and perhaps put some on a web page.  Well, wouldn't you know
there are some terrific images in that batch and a few that I want to
print.  

So after all the remarks about Qimage I decided to give it a try (I
have the latest version).  I first upsized an image from 1.2mp to 8.4
mp using Bicubic in PS-CS.  I was surprised to get excellent results
and was able to make a very good 6x8 print.  Then I tried most of the
Qimage choices, starting with Pyramid (supposedly the best).   I did
Print To File and then opened it in PS.  It's a sand dune image with a
large smooth area about Zone III.  I was disappointed to find
strange hatch-mark looking artifacts all through it, and less
sharpness as well.  When I did it again with increased sharpening, it
just made the hatch marks more obvious.  I tried several of the
choices and none were as good as PS/bicubic.

I did a second one, and today a third one, and got equally good
results each time.  I actually printed an 11x14 of one on EEM just to
see what would happen.  It had relatively poor resolution, of course,
but at 8mp there was no pixellation.  It's surprisingly good
considering it began at 1.2mp.  It's a nice landscape and from 3' away
it looks good.

Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm

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