The curve tool does this, Cheers Sent from my iPhone
On 12 May 2012, at 13:26, Paul Schoen <[email protected]> wrote: > Hello, > > this is my first post to the mailing list, so I hopefully get everything > right in explaining my particular problem: > > I have a composite of a Background in which feet are moving over a pavement. > As they move they make shadows on the pavement. The foreground is moving > spider that was filmed on the same pavement later on. Now I want the > brightness of my foreground to change exactly like the shadows of the moving > feet change the brightness of the pavement in the background. > > Long time ago, there was a node in Shake called AnalysePixel or something > like that which could read out a certain area of pixel over the whole length > of a shot. With this data one could drive the ColorCorrect-node to > automatically change the the brightness or any other value. I used it once to > match a non-flickering shot to a flickering one (NOT FLICKER REMOVAL!!!). > > I found nothing similar in Nuke except the Spotmeter-function in the Viewer. > But I found no hint to read its values and use it in an expression. I need > something to constantly analyze the brightness over a given range of frames > in a certain region of pixels and to drive a Grade or ColorCorrect-Node with > this values via an expression. > > Does anyone have any hints on this? I'm using Nuke 6.2v1. > > For convenience I uploaded the comp layout: > http://dl.dropbox.com/u/1891745/dpadb_022_lay_v01.mov > > Thanks, > > Paul Schoen, Vienna > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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