On Sat, 11 May 2002, Paul Robertson wrote:
> > > On Fri, 10 May 2002, Paul Robertson wrote:
> > >
> > > > I have some software which uses Xv to render images acquired from a TV
> > > > camera in something like realtime.
> > > > Currently we only capture even fields, and we scale the image
> vertically by
> > > > 200%. It looks OK.
> > > >
> > > > Now we need to start working with both odd and even fields. If we do
> that
> > > > with our current software, the picture wobbles up and down.
> > > > If I write some code to adjust the position of the odd field, the
> picture
> > > > still looks wrong, particularly if nothing is moving in the picture.
> > > > If I write code to reconstitute a full frame by interlacing the odd
> and even
> > > > fields, then I see nasty artefacts when there is horizontal motion in
> front
> > > > of the camera.
> > > >
> > > > We actually use ATI Rage and the r128 driver at the moment, but a
> while ago
> > > > we evaluated the i815 graphics controller. I remember that it
> supported a
> > > > number of different hardware scaling methods including "Up
> interpolation"
> > > > and "Down interpolation", and I wondered if I could use these modes to
> get a
> > > > better quality picture.
> >
> > ATI hardware does support this but the driver does not do this (yet?).
> > What software do you want to use this with ? Is the source available for
> > download ?
> >
> > Vladimir Dergachev
> >
> Its closed source commercial stuff I'm afraid.
Ohh. Well in this case this will stay unsupported..
Vladimir Dergachev
>
> It looks like this topic has been the subject of quite some discussion in
> the past
> before momentum was lost. I'll try to stay in the loop this time in case
> there is
> anything I can do to help move things along.
>
> --
> Paul
>
>
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