Re: [Gimp-print-devel] Tests with Stylus 640

[<sh...@al...>]

> > BTW, I put an image on http://www.tiac.net/users/rlk/Graphic2.prn that
> > is a Photo 750 output from Windows.  Unprint currently gives a lot of
> > errors.
> 
> Actually it appears to be a rather low resolution family photo.

Scratch that.  It is a family photo, but the resolution isn't that low.
There was a bug in unprint that was causing pixels to be put in slightly
the wrong place, resulting in what appeared to be large scale pixelization.

With the current unprint, it unprints rather well.  Yet, I'm at a loss to
explain the two vertical bars that appear on the image.

If you run this through unprint -u, to unweave the softweaving you can see
the origin of these features more clearly.  On some passes, there is a
single pixel wide vertical bar.  The position of the bar is not the same in
each pass, resulting in a multi-pixel wide vertical bar when the data is
woven.

I don't know if this is a bug in unprint, or due to some undocumented
command effect that I haven't taken into account.  Anyone have any ideas?

I don't have time to study this right now.  Maybe tomorrow.  At the moment,
I'm going to work on the "bug in unprint" assumption, since that's easier
to handle, but I have a hard time imagining a bug that would cause this
particular effect.

Eric