Digital BW, The Print

Hi Bob,

> Here is a reply from Kennedy McEwan on the x7x list on the same
> subject. He
> seems to believe (has proved?) that the Epson driver upsamples to
> 720 or 360
> ppi depending on the model.
>
>
> "Well, if you look through the archives of this list you should find a
> posting made over a year ago by either Royce or Chris Bair which
> referenced a test pattern which clearly demonstrated the limitations of
> the Epson driver's resampling algorithm when printing at other than the
> optimum resolutions.

I remember someone posting something of the such, but the test patterns I
saw didn't prove the claim (if that is the same thing they are talking
about).  They were NOT grayscale images, they were in fact simply lines,
black lines.

Also, the conclusions drawn, let's say, did show "something" at 720/360, it
could simply be that the driver only uses data up to that point, not
necessarily that it resamples.

I'm not convinced one way or the other for the Epson driver.  Also, whether
the driver resamples or not really has nothing to do with sending PPI to the
printer based on some magic number.  That was the initial question, and the
resampling was subsequent to that.  I still contend that there is no magic
number for sending to the Epson driver, at least the one for the 3000,
though I will agree that you MAY be able to send it a "native" upsampled
image, meaning matching the resample PPI, and it MAY give you "different"
results than letting the printer driver do the upsampling...now whether
those results are better or not, I really don't know, and certainly some
experimentation would be interesting...except for me, I use the Piezo driver
for my B&W, and for that, I don't believe it would help.

Thanks for posting that info, and I'll read it over and get in touch with
Kennedy and pose some questions to him about it.

Regards,

Austin