E.Chalaron schrieb:
> Talking of what .....
> There is a scratch remover under AVISYNTH......... for windows...
>
Such a filter is easy to implement:
let
p0
p1
p2
be vertical neighbour-pixels. Dropouts are horizontal lines, with either
black or white color (it is the same for bad Sat-TV reception...).
Dropouts are outside of p0 and p2...
so you can do a filter like this:
if( (p1<p0 && p1<p2 ) || ( p1>p0 && p1>p2) )
{
// this could be a dropout... but it could be OK, too...
if( p1>white_threshold || p1<black_threshold )
{
// now it is very unlikly that we filter something other than a
drop-out...
p1 = (p0+p2)/2
// could use something better than linear interpolation...
}
}
To make this filter even less prone to detection-errors one could
implement a pixel-counter, too and only filter detected drop-outs longer
than xyz-pixels. BTW: I would implement a filter like this but my job
hinders me doing real work, currently... *g*
cu
Stefan
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