Digital BW, The Print

on 3/27/02 10:28 AM, Paul Roark wrote:

> The procedure I tried here (and would like some feedback on) was to run a
> Photoshop gradient at 50% opacity over and the opposite direction of the
> 21-step gray scale smooth ramp of the scanned test strips being compared.
> The purpose of this procedure is to neutralize the ramp -- except for those
> parts of the printed ramp that deviate from the Photoshop gradient ramp that
> was used to make the test file in the fist place.  What should stand out, I
> hypothesize, is the defects in the printing system/workflow.
> 
> To further accentuate the defects/deviations, I increased contrast 90% and
> brightness 30%.

Paul

Thanks for sharing your tests.

Could you run through your reasoning/methodology one more time? I thought
the smooth grayscale/step-wedge was already a good representation of a
challenging print. I'm not sure I follow why you took the extra steps you
did.

That's not to say it wasn't a good idea, just that I don't get it yet.

Thanks,
Todd