Hey Pat, When I talked about converting image spaces I meant converting from one projection(where projections stands for the mapping of a 3dimensional world to a 2 dimensional world) to another. More specifically from a rectilinear(a normal image as we know it) projection to a equirectangular projection(what we usually call latlong) and vice versa. Every tile of a cubic map is a rectilinear projection. But instead of going to those very specific cube tiles we usually generated specific "rectilinear crops" of just what we needed.
Yes we did our camera tracks in rectilinear space, as that is what most tracking software understands, but it is very difficult to get precise enough 3d tracks of full spherical environments. In your case I would probably just go to a rectilinear crop, so for example a cubemap, do the clean up in there and bring it back into the latlong afterwards. Hope that helps! Good luck with your shot! cheers, Patrick On 29.06.2015, at 15:18, Pat Wong <patwon...@gmail.com> wrote: > To camera track a scene in Latlong Space is this possible in Nuke? If not > what softwares can. > > I need to remove shadows that are on the ground plane in a shot. > > I've tried tracking a groundplane in the cubic space without much luck. Too > much distortion any other ideas? > On 29 Jun 2015 6:10 am, "Patrick Heinen" <mailingli...@patrickheinen.com> > wrote: > Hey Pat, > > glad that you liked "HELP", I worked on it as a 2D TD and Compositor. In our > case we ended up comping a lot in Latlong space. It works for a lot of cases > and you get used to it pretty quickly. We also had tools that allowed us to > quickly check things in a rectilinear view(similiar to a cube face) or move > it from one image space to the other. Additionally we used quite a bit of > projections which worked really well. Yes shifting it around with a spherical > transform is also an option we used. Just keep in mind, that any > transformation will most likely be a filter hit, and therefore soften your > plate. > > cheers, > Patrick > > On 28.06.2015, at 07:21, Pat Wong <patwon...@gmail.com> wrote: > >> >> >> >> On 28 June 2015 at 15:04, Pat Wong <patwon...@gmail.com> wrote: >> Deke >> >> Thanks for the reply, yes ive seen these Videos before and whilst i believe >> the techniques in the video will work for most situations where the camera >> is locked off, Things tend to get a bit more complicated when the camera >> plate is moving and there are subjects in the shot, >> >> >> On 28 June 2015 at 01:26, Deke Kincaid <d...@thefoundry.co.uk> wrote: >> Pat, to answer your question the workflow with the existing nuke tools >> either: >> 1. breaking the latlong images into six packs with the sphericalTransform >> node. Fix in cubic, then reconvert back to latlong. >> >> >> How do you deal with this if an object that needs to be removed travels >> along multiple packs. Logically i assume you'd just tile up the six packs >> and deal with it that way, But the image dimensions might end up potentially >> large... >> >> >> Laying the cube maps into a horizontal cross pattern like this eg. >> http://wiki.polycount.com/wiki/Cube_map >> >> objects crossing the seams from the UP cube diagonally to FRONT cube i can >> see that as a potential problem, how would one deal with that? >> >> >> >> >> >> >> >> >> >> >> 2.mapping the latlong onto a sphere and then projecting images onto the >> sphere to patch and fix images. >> >> >> >> Would projecting onto a sphere would result in a lack of parrallax? so im >> guessing you might need geo of the scene ideally? >> >> >> Pat >> >> >> >> >> Frank Reuter did some videos 4 years ago showing some of these workflows on >> making HDR's which is exactly the same as working with VR. Also he has some >> nice stitching with cards videos in there. >> >> https://vimeo.com/album/2567386 >> >> On Saturday, June 27, 2015, Pat Wong <patwon...@gmail.com> wrote: >> Any of you Nukers on the forums like to share any tips or experiences for >> Comping in LatLong Space. >> >> Its a new exciting arena. One in which i just delving into...Ive just seen >> the google stories specifically 'HELP' with its comped 3d Lizard and it >> looked great. >> >> >> I've also seen the recent Nuke tech demo at NAB this year and can see the >> people are still developing techniques to how to actually use the more >> traditional 2D comp tricks in this LatLong distorted space. >> >> >> 1. Rig removals are a case in point, is the best way to do to tackle these >> spherical transform the rig into the less distrorted central region and then >> rotate it back to its orginal or is their a better way. If this region needs >> to be tracked.. how do you approach this? >> >> >> 2. stabilizing plates. whats the best approach? >> >> 3. The LatLong blue that the Foundry demo'd in the Blink Script was >> interesting as the blur strength was obviously stronger at different parts >> of of the distorted plate. >> >> This lead me to think could we somehow use a sphercial distortion map for >> all our nodes or a utilize a STMAP UV map in some way. >> >> >> It would be good to hear from other peoples experience with comping in his >> LatLong Space , on what TO DO and NOT TO DO. >> >> >> >> cheers >> >> pat wong >> >> >> >> >> -- >> ----- >> Deke Kincaid >> M&E OEM Development Manager >> The Foundry >> Mobile: (310) 883 4313 >> Tel: (310) 399 4555 - Fax: (310) 450 4516 >> >> _______________________________________________ >> 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 >> >> >> _______________________________________________ >> 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 > > > _______________________________________________ > 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 > _______________________________________________ > 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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