Digital BW, The Print

At 5:03 AM +0000 1/8/06, Clayton Jones wrote:

>Here's what I'm doing and what I've tried so far.
>
>The Challenge: upsize some 1.2 mp JPGs that were shot with a Casio
>Z-50, a pocket sized 5mp digicam.  Upsize to 8mp.


Clayton,

I'm sure you've already thought of this, and I admit that, from 
reading this and later posts, I don't _fully_ understand your 
methodology, but:

Did you ensure that your target file-size produced an image whose dpi 
at your target print-size was an integral fraction of the 
printer/printer-driver's native resolution?

The reason I ask this is that driver/printer-firmware resampling of 
an image _might_ highlight the anomalies produced by different 
up-sizing algorithms in different ways, perhaps emphasizing the 
failings of an essentially superior method while effectively 
suppressing the failings of an inferior one.

Having said that, I haven't found anything that produces better 
results for me than CS/CS2 bicubic.

I really appreciate you doing these tests and introducing me to Jack 
Flesher's workflow. It looks like a major implication of your tests 
is that the most important thing is to do all the work, including 
initial sharpening, at native resolution before resizing.


Best wishes,

-=-Dennis






















.