[Hp3300backend-devel] HP3400/4300 vertical resolution issue test

[Bertrik S. <be...@zo...>]

Hi all,

As a lot HP3400/4300 owners have already found out, there is an issue
with the vertical resolution of scans done with these scanners in the
current version of the testtool. While a normal scan is done at
150 dpi both vertically and horizontally on the HP3300, the vertical
resolution is fixed at 300 dpi for the HP3400 and HP4300.

(The HP3400 and HP4300 have a slightly different way of setting the
vertical resolution compared to the HP3300. Instead of a single
value to set the vertical resolution, they have two tables
containing exponential decaying and exponential increasing
series.)

I just committed a new version of the sources to CVS for some
tests to resolve this vertical resolution issue.
The new version will by default still use 300 dpi (so as not to
surprise unsuspecting users), but by uncommenting a few lines,
the test will be enabled.

If you have a HP3400 or HP4300 and have already succeeded in
making it scan using the current version of the testtool and you
like to help testing, just let me know and I'll send some more
detailed instructions for this test.

Bertrik