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
