> > 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.
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 _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
