Re: [CinePaint] Looking for a feature useful to smooth timelapse sequences - grading

CinePaint has the curve tool, which works in RGB and Lab colour spaces.
The curve tool is quite common. So I wonder if you had allready tried 
this. It is a per frame editing tool.

One difficulty I see with changing punctually the light conditions is 
that it will introduce so many changes that it is hard to follow up.
Probably you can use the flash in the whole film. This way its influence 
is allways present. Telling us more about the special conditions would 
help us understanding the problem you are faced with?


For colour editing of film sequences, it is called color grading in the 
film industry, there was not that much interesst in the past, order wise. 
This is probably because grading in film studios is most often hardware 
based, with trottles, turning knobs and balls. A colorist tould me it is 
like playing piano - in real time. ... quite hard to acieve with keybord 
and mouse.

Anyway CinePaint has a feature called look profiles to change colour 
appearance statical for a whole sequence. It is a bit slow due to the 
underlying CMM. But it could be modified to manipulate continious changes.
The manipulation would be done in the look profiles - the abtract style of 
ICC profiles.

regards
Kai-Uwe Behrmann
                                + development for color management 
                                + imaging / panoramas
                                + email: [email protected]
                                + http://www.behrmann.name


Am 21.11.06, 17:40 -0800 schrieb John Arrowwood:

> All,
> 
> I'm a photographer trying to do timelapse sequences, and I'm looking
> for a tool that might help me to get around the difficulty that arises
> under changing light conditions.  Flashes in the resulting movie are
> very difficult to deal with.
> 
> I tried to write my own tool that took the average of the 10 (or more)
> frames before and after and then try to 'adjust' the current frame to
> get as close as possible to that target.  Unfortunately, I could never
> quite get the math right.
> 
> I'm CERTAIN that there are already tools out there that do what it is
> I'm looking for.  But I don't know what it is called, so I don't know
> how to find them.
> 
> Is CinePaint a tool that has the feature I'm looking for?
> If not, does anybody have any suggestions of a tool that does?
> Or, perhaps, can point me to the necessary math so that I can
> implement it myself?
> 
> Thanks!
> 
> -- 
> --------------------------------------------------
> John Arrowwood
> John (at) Arrowwood Photography (dot) com
> 

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