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
