[sane-devel] Canon LiDE 35: test report

[Henning Meier-Geinitz]

Hi,

On 2005-12-29 20:55, Bert Kortenbosch wrote:
> I did some tests with the Canon LiDE 35 Scanner
> and the sane genesys backend, based on the CVS snapshot
> "snapshotsane-backends-2005-12-29.tar"

> 2400: text distorted, width/height ratio wrong

This is a known issue.

> Color (Scan Mode, Bit depth 16)
> 75:   ok, color distortion visable (viewer mode)

Could you show us a small sample of this effect? I can confirm a
slight line distance problem when looked at high magnification, but
it's also visable at 8 bit per color. It may be a hardware problem...

> Optical resolution 1200 x 2400 dpi

That's the problem, the optical resolution is only 1200 dpi in X
direction.

> Selectable resolution 25 - 9600 dpi (software)

This is just marketing.

> Is the 2400 dpi mode correctable from within the backend or is this an
> Xsane issue?

It's a backend issue. The backend must double the x resolution in the
1200/2400 dpi mode. Or better yet, interpolate the missing pixels.

As a work aound, you can use gimp or similar programs to double the
number of pixels in x direction.

Bye,
  Henning