The curve tool does it sort of. pixel analyzer was live. Using average luma in curve tool but you have to pre analyze which is probably fine in your case. Randy S. Little http://www.rslittle.com
On Sat, May 12, 2012 at 5:45 AM, James Etherington <[email protected]> wrote: > 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 > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users _______________________________________________ Nuke-users mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
