[MEncoder-users] issues for time-lapse video encoding

[belcampo]

DaveG wrote:
> On Monday 18 May 2009, Hugh Secker-Walker wrote:
>> 2) I want to do some filtering of the resulting video.  In particular,
>>    it would be nice to remove all the objects, e.g. birds, that appear
>>    in only a single frame.  I can imagine that some sort of median
>>    filter would do the job (e.g. median for each pixel across 7
>>    frames).  What should I be looking at for this kind of filtering?
>>    It's a kind of denoising, but the extent of the noisy object can be
>>    quite large, but always only for a single frame.
> 
> Some years ago, I saw a program which could do exactly that.  Unfortunately I 
> can't remember what it was called or where on the interwebs I saw it.
> 
> IIRC it was some sort of acedemic project, the software being free.  I 
> honestly can't even remeber if it was *nix or Windows based but suspect it 
> was *nix based.
> 
> The object of the project was to take multiple substantively identical images 
> and remove the diferences, particularly for photographers wanting to take 
> photos and remove the people, eg take half a dozen trpid mounted shots of a 
> building, run them through the programme and the moving people 
> would "magically" disappear as they are not in all of the images.
> 
> Another example given was photos taken from a bridge over a road.  He took 
> multiple shots, processed them through his program and ended up with a photo 
> of an empty road.
> 
> I would dearly love to find this program again, especially if it is *nix 
> based, not Windows based.
> 
dvbcut has a feature of showing the difference between 2 frames, maybe 
for a coder there is something to learn/use from.