DePanStabilize - scene change handling?

[2Bdecided]

Does this filter take account of scene changes? I know it can tell you when it thinks there's a scene change - but does it, by default, "break" the motion compensation at scene changes, or carry it over (giving strange results)?

My usage is...

spline36resize(1024,576)

maxstab=60 #maximum values for the stabiliser (in pixels) 20 is a good start value

est_left=20 est_top=20 est_right=20 est_bottom=20 est_cont=0.8 #crop values for special Estimate clip

CLeft=32 CTop=16 CRight=32 CBottom=16 #crop values after Depan and before final resizing (40,30,40,30)

stab_reference=last.tweak(cont=est_cont).levels(79,1.0,81,255,0,coring=false).greyscale().invert()

mdata=DePanEstimate(stab_reference,trust=1.0,dxmax=maxstab,dymax=maxstab)
stab=DePanStabilize(last,data=mdata,cutoff=0.5,dxmax=maxstab,dymax=maxstab,method=1,mirror=15)
stab2= stab.crop(CLeft,CTop,-CRight,-CBottom)
#stab3=DePanStabilize(last,data=mdata,cutoff=0.5,dxmax=maxstab,dymax=maxstab,method=1,info=true)

stab2


etc.

Many thanks.

Cheers,
David.

[Fizick]

Yes, it restart stabilization at scenechanges

[2Bdecided]

Yes, it restart stabilization at scenechangesHow does it determine scene changes?

I wonder if the "levels(79,1.0,81,255,0,coring=false).greyscale().invert()" part, which does seem to help motion tracking, also breaks the scene change algorithm? Or if (because it's also based on motion) it still works OK?

Thanks!

David.

[videoFred]

Hi David,

I see you are using my stabilizing code, but you have changed my stab_reference clip a little bit. :p

Anyhow, to check if scene change detection works, just set 'info=true' in DepanStabilize. You will see that 'base' changes to 'BASE!' at scene change. If not, you must tweak the gamma of the 'stab_reference' clip.

To make life easy, there is an option in my original script to show the original vs the stabilized clip, with all the info you need.

Fred.

[egrimisu]

Hi Fred, i checked out your site with the restoration you've done, congratulations i like your job. I have a old 8mm tape of my fathers 50years birthday, do you think you can help to restore a bit. My experience in restoring real video lacks, i haven't worked only wih anime till now.
I'm not familiar with stabilization, shadow improving and lever correction.

Hi David,

I see you are using my stabilizing code, but you have changed my stab_reference clip a little bit. :p

Anyhow, to check if scene change detection works, just set 'info=true' in DepanStabilize. You will see that 'base' changes to 'BASE!' at scene change. If not, you must tweak the gamma of the 'stab_reference' clip.

To make life easy, there is an option in my original script to show the original vs the stabilized clip, with all the info you need.

Fred.

[2Bdecided]

Thank you Fred - it is indeed your code, and I didn't know that I'd changed it(!). I hadn't read about base/BASE so will take a look. Many thanks!

Cheers,
David.

[videoFred]

I have a old 8mm tape of my fathers 50years birthday

8mm tape is not the same as 8mm film!

Fred.

[videoFred]

I didn't know that I'd changed it(!).

Perhaps it's an older version you have? My newest script is available in the film restoring thread.

Fred.