A friend pointed me to this tutorial: https://vimeo.com/63503007 <https://vimeo.com/63503007> It helped quite a bit with the workflow ideas, including the BlackOutside node which I was unaware of. That solved the stretchy pixels problem.
Thanks for all of the help and suggestions! As I usually do, I will be saving an example script as a sort of Nuke Notebook, so the next time I need to do something similar, I’ll be able to look it up… ;^) Rich > On Apr 17, 2015, at 10:53 PM, Diogo Girondi <diogogiro...@gmail.com> wrote: > > The Reformat node in Nuke misses a option to reformat by a full box with > x,y,r,t where the inputs bbox is preserved. > > But since it doesn't, what you can do is do your LensDistortion then add a > Crop where x,y,r and t are derived from the inputs bbox via expression. Then > do your jazz and merge the output of that jazz to your original input or > something that has the same format of your image before the crop. On the > output of that jazz before the merge add a position node and type in the x > and y values from the crop, this should yield your original image with your > jazz minus the losses associated with the LensDistortion. > > cheers, > diogo > > On Fri, Apr 17, 2015 at 3:09 PM, Rich Bobo <richb...@mac.com > <mailto:richb...@mac.com>> wrote: > *** OK, so here’s what I’ve got… > > > LensDistort: > [x] Undistort > filter [Cubic] > Distortion Scaling [Scale to Input Format] > > Reformat: > type [scale] > scale [1.041] > resize type [none] [x] center > filter [Cubic] [x] preserve bounding box > > Crop: > preset [format] > box (...selected "Set to default" from anim. menu to populate x, > y, r, and t values...) > [x] intersect [x] black outside > > > — The Reformat is used to expand the format size to encompass the undistorted > plate size… which gives stretched pixels. > — The Crop with intersect and black outside squashes the stretched pixels. > > > *** Whew! Seems like the LensDistort node ought to have an option to create > this without all the extra nodes, right...?!? > > > > *** And, to bring things back to square one… > > (Copy of original) LensDistort: > [ ] Undistort (…unchecked...) > filter [Cubic] > Distortion Scaling [Scale to Input Format] > > Reformat: > type [scale] > scale [0.9606147] (...value derived from 1/1.041 — one, divided by > original scaling amount...) > resize type [none] [x] center > filter [Cubic] [ ] preserve bounding box (…unchecked...) > > > *** So, thank you to everyone for your help! > > > Rich > > >> On Apr 17, 2015, at 1:29 PM, Igor Majdandzic <subscripti...@badgerfx.com >> <mailto:subscripti...@badgerfx.com>> wrote: >> >> Thinking about it, just put the crop after the reformat and check intersect. >> that should do the trick with the least amount of work. Just make sure the >> crop is connected directly so it picks up the images size and not that of >> the root settings. >> >> Am 17.04.2015 um 19:13 schrieb Igor Majdandzic: >>> Yeah, for some reason it puts black based on the image before reformatting. >>> When you compare the two the visible information is the same. But in case >>> you really need black, you could always put a crop after the reformat with >>> box set to the bounding box of the image, with black outside and intersect >>> checked. That way you get the image with a black outline instead of the >>> stretched pixels. >>> >>> Thats what we are here for :) >>> Igor >>> >>> Am 17.04.2015 um 18:58 schrieb Rich Bobo: >>>> Igor, >>>> >>>> Thanks! I had tried that before, but this time I turned off “black >>>> outside”. That was cropping to some arbitrary size - i.e., not my root >>>> format and not anything else that makes any sense. The pixels that are >>>> outside my LensDistort-expanded bounding box are stretched, which is kinda >>>> ugly, but I can live with that. I had hoped that the pixels would be >>>> mapped to black. It seems like that’s what the black outside button should >>>> be doing, but it’s obeying some other unknown format size… >>>> >>>> Thanks! >>>> Rich >>>> >>>> >>>>> On Apr 17, 2015, at 12:47 PM, Igor Majdandzic <subscripti...@badgerfx.com >>>>> <mailto:subscripti...@badgerfx.com>> wrote: >>>>> >>>>> Just put a reformat after the LD node and set type to 'scale', the scale >>>>> itself whatever suits you (usually 1.1 should suffice) and resize type to >>>>> 'none'. >>>>> That should do the trick. >>>>> >>>>> Igor >>>>> >>>>> Am 17.04.2015 um 18:16 schrieb Rich Bobo: >>>>>> Hi, >>>>>> >>>>>> I need some help with figuring out how to reveal the extra, hidden >>>>>> pixels generated by the LensDistortion node… How do I show the pixels >>>>>> that get scaled out of the format size after an undistort? I see the >>>>>> larger bounding box, but there doesn’t seem to be any option in the >>>>>> LensDistort node to expand the plate/format size to encompass the >>>>>> undistorted size. I.e., to have the size expand without clipping pixels. >>>>>> It’s the equivalent of increasing Photoshop’s Canvas Size. If I do an >>>>>> Undistort in PFTrack, for example, the image size is automatically >>>>>> expanded. >>>>>> >>>>>> I don’t know why I can’t figure this out, but any combination of >>>>>> Reformat or Merge-ing over a larger image size will not reveal the >>>>>> hidden pixels! I know I must be missing something really simple, >>>>>> right..? (8^\ >>>>>> >>>>>> Thanks for any help, >>>>>> Rich >>>>>> >>>>>> >>>>>> Rich Bobo >>>>>> Senior VFX Compositor >>>>>> Armstrong White >>>>>> Email: rich.b...@armstrong-white.com >>>>>> <mailto:rich.b...@armstrong-white.com> >>>>>> http://armstrong-white.com/ <http://armstrong-white.com/> >>>>>> >>>>>> Email: richb...@mac.com <mailto:richb...@mac.com> >>>>>> Mobile: (248) 840-2665 >>>>>> Web: http://richbobo.com/ <http://richbobo.com/> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Nuke-users mailing list >>>>>> Nuke-users@support.thefoundry.co.uk >>>>>> <mailto:Nuke-users@support.thefoundry.co.uk>, >>>>>> http://forums.thefoundry.co.uk/ <http://forums.thefoundry.co.uk/> >>>>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>>>> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >>>>> _______________________________________________ >>>>> Nuke-users mailing list >>>>> Nuke-users@support.thefoundry.co.uk >>>>> <mailto:Nuke-users@support.thefoundry.co.uk>, >>>>> http://forums.thefoundry.co.uk/ <http://forums.thefoundry.co.uk/> >>>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>>> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> Nuke-users@support.thefoundry.co.uk >>>> <mailto:Nuke-users@support.thefoundry.co.uk>, >>>> http://forums.thefoundry.co.uk/ <http://forums.thefoundry.co.uk/> >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >>> >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> Nuke-users@support.thefoundry.co.uk >>> <mailto:Nuke-users@support.thefoundry.co.uk>, >>> http://forums.thefoundry.co.uk/ <http://forums.thefoundry.co.uk/> >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk >> <mailto:Nuke-users@support.thefoundry.co.uk>, >> http://forums.thefoundry.co.uk/ <http://forums.thefoundry.co.uk/> >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> > > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk > <mailto:Nuke-users@support.thefoundry.co.uk>, http://forums.thefoundry.co.uk/ > <http://forums.thefoundry.co.uk/> > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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