[XviD-devel] Global Motion Compensation

[Christoph Lampert]

On Fri, 25 Oct 2002, Marco Al wrote:

> Christoph Lampert wrote:
> > On Fri, 25 Oct 2002, Radek 'sysKin' Czyz wrote:
> >> 
> >> I'll tell you something about the results found: very good. I'm pretty
> >> sure that the precision is +/- one pixel, which is exactly what we
> >> need to follow the procedure with gradient-descent approach (I also
> >> have some ideas about this part).
> > 
> > Can you explain how you get global motion from local vectors?
> > Just calculating the average of all MVs will not be robust against locally
> > moving objects.
> 
> Least median of squares seems to be the most popular method.

Smolic starts with "structured" blocks only and uses a Maximum-Likelihood
approach after that. He claims results are very good (and fast).

gruel