[sane-devel] New release of the alpha version of hp5400 SANE backend

[Henning Meier-Geinitz]

Hi,

On Wed, Mar 05, 2003 at 11:43:03AM +1100, Martijn van Oosterhout wrote:
> 2. Since the intrinsic resolution of the scanner is only 300dpi, for
> everything higher it needs to move the head from side to side (I don't know
> if this is true, but it makes an odd sound at higher res).

I have never even seen a HP scanner but I'm not sure if I an believe
that the hed moves in x-direction. However, I know about a scanner
that has 6 ccd lines instead of three and half of these lines were
shifted by 1/2 pixel. So you would get two lines per color.

However, this is a 1200*2400 dpi scanner. Probably 600*2 dpi is
cheaper than 1200 dpi CCDs. However 600 dpi CCDs are pretty common so
I'm surprised that there are 300*2 CCDs.

Maybe the sound is from the motor running in half-step mode (or
whatever it's called).

Bye,
  Henning