You could export your undistorted plate from Photoscan, match that distortion in nuke with the LensDistortion node. Then change the input on the node to use your CG and have it distorted.
If you could use any distortion values from Photoscan that would be nicer, but this could also work? Cheers, Elias Ericsson Rydberg 2014-05-13 12:02 GMT+02:00 Schneider, Abraham <[email protected]>: > Yes, I know about that. But I don't want to undistort my plates. I'd like > to distort the CG renderings and merge them with my original plates. So I > have to 'invert' the undistortion that Photoscan does and apply this to CG > renderings. I'll get the parameters of the undistortion inside of > Photoscan, but would need a node in Nuke where I can use these values. > > Abraham > > > Am 13.05.2014 um 11:30 schrieb Misho Ristov: > > > You can export undistorted photos from photoscan and use that directly > in Nuke > > > > > > from memory: > > > > tools->undistort photos > > > > > > Misho > > > > > > On 12.05.2014 23:07, Nathan Rusch wrote: > >> I think one of the 3DEqualizer distortion models is based on the Brown > model. If that's the case, there's a good chance you can use their > distortion plugin to get the same result. > >> > >> Details here: > >> > >> > >> http://www.3dequalizer.com/index.php#?site=tech_docs&id=110216_01 > >> > >> > >> > >> -Nathan > >> > >> -----Original Message----- From: Schneider, Abraham > >> Sent: Monday, May 12, 2014 5:25 AM > >> To: Nuke user discussion > >> Subject: [Nuke-users] Photoscan lens distortion in Nuke? > >> > >> Hi there! > >> > >> I'm just playing around with Agisoft Photoscan ( > >> http://www.agisoft.ru/products/photoscan/standard/ > >> ) to deal with a large set where I have to do some CG additions in > several shots. Most of the shots are with locked camera. So having a rough > temp model of this outdoor set (big square with some buildings surrounding > it) would be really helpful to correctly position the CG buildings. > >> > >> Reconstructing the set with Photoscan from my DSLR images worked quite > nice. The resulting model should be more than enough to help creating these > shots. My idea now was to add single frames from each of my locked camera > shots (ARRI Alexa) into Photoscan, align these images as well and export > the found camera positions with the model and use these virtual cameras for > my renderings. > >> > >> Problem now is: to align all the images, Photoscan uses an complex (?) > lens distortion algorithm and undistorts all images before doing there > alignment. So the undistorted images match fine to the model from > Photoscan. But to do my comps, I'd have to it the other way around: distort > the CG renderings and merge them with my original Alexa footage. So I'd > need a node in Nuke to apply the same lens distortion as Photoscan does. I > get the values from Photoscan, but which node can I use to do the > distortion? > >> > >> I think, Photoscan uses the same model as they use in their free lens > distortion software: > >> http://www.agisoft.ru/products/lens/ > >> , which mentions a 'Brown's distortion model'. Anyone of you knows if > there is a node in Nuke (or Nukepedia or so) which uses the same > algorithms? Or any other idea? > >> > >> Thanks, Abraham > >> > >> > >> Abraham Schneider > >> Head of VFX pipeline / VFX Supervisor > >> > >> > >> Türkenstr. 89, 80799 München / > >> Phone +49 89 3809-1096 > >> > >> EMail > >> [email protected] > >> > >> > >> Visit us on Facebook!________________________________ > >> > >> > >> ARRI Film & TV Services GmbH > >> Sitz: München Registergericht: Amtsgericht München > >> Handelsregisternummer: HRB 69396 > >> Geschäftsführer: Helge Jürgens, Josef Reidinger > >> _______________________________________________ > >> 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 > > _______________________________________________ > 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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