Any parallel lines? Find a vanishing point(s). Draw a cube from this and add a 3d cube. Adjust length and rotation of the camera until the cube fits the lines. Should give you your focal length.
Howard > On 6 Dec 2013, at 18:58, Elias Ericsson Rydberg > <[email protected]> wrote: > > Well, here I am thinking people live in the best of worlds. I agree with > previous posters, estimated positions of point will have to do. Eliminate as > many variabels as you can. Knowing, or estimating, the FoV is key! > > Cheers, > Elias Ericsson Rydberg > >> 6 dec 2013 kl. 19:36 skrev Richard Bobo <[email protected]>: >> >> Elias, >> >> Unfortunately, the image was shot a while ago, in a remote location… >> >> Thanks, >> Rich >> >>> On Dec 6, 2013, at 1:24 PM, Elias Ericsson Rydberg >>> <[email protected]> wrote: >>> >>> Yeah, as soon as you've found out the field of view you can usually match >>> it quite well by hand. And as the previous poster said, knowledge of the >>> dimensions of a few objects will help a lot to get the right scale. >>> >>> If you've surveyed the 3D positions of a few points on set you could of >>> course create the same points in Nuke as axises (spelling?) and match >>> toward that. Reconcile3D would be very useful for that purpose. >>> >>> Cheers, >>> Elias Ericsson Rydberg >>> >>>> 6 dec 2013 kl. 18:20 skrev John Mangia <[email protected]>: >>>> >>>> First thing I'd do is check if there's any EXIF data in the image from the >>>> camera that shot it. It might give you an idea of the camera make, focal >>>> length, etc. Which will also help you figure out the size of the >>>> filmback. If there's a common object in the shot like a pen or street >>>> sign you can use the known size of that object to help you figure out the >>>> focal length and camera position. Hope it works out for you. >>>> >>>> >>>>> On Fri, Dec 6, 2013 at 12:12 PM, Richard Bobo <[email protected]> wrote: >>>>> Hi all, >>>>> >>>>> Anyone have any good methods for camera matching a single still image in >>>>> Nuke…? >>>>> >>>>> Thanks, >>>>> Rich >>>>> >>>>> >>>>> Rich Bobo >>>>> Senior VFX Compositor >>>>> Armstrong-White >>>>> http://armstrong-white.com/ >>>>> >>>>> Email: [email protected] >>>>> Mobile: (248) 840-2665 >>>>> Web: http://richbobo.com/ >>>>> >>>>> "Man does not live by a turkey in every oven or a color TV set in every >>>>> home. Man lives by faith and hope and love, by the star on the horizon, >>>>> by the trumpet that will not call retreat." >>>>> - E. Merrill Root >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Nuke-users mailing list >>>>> [email protected], http://forums.thefoundry.co.uk/ >>>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> >>>> >>>> >>>> -- >>>> John Mangia >>>> >>>> 908.616.1796 >>>> [email protected] >>>> _______________________________________________ >>>> 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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