Patrick Thanks for the reply. Got it
When you converted in and out of this rectilinear space that's not a cube face . Is this using in house tools or with standard nuke tools. Can you elaborate what the process is actually? Cheerss On 30 Jun 2015 6:53 am, "Patrick Heinen" <[email protected]> wrote: > 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 <[email protected]> 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" <[email protected]> > 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 <[email protected]> wrote: >> >> >> >> >> On 28 June 2015 at 15:04, Pat Wong <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 >>>> [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 > > > > _______________________________________________ > 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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