Camera Tracking - Nuke 101: Professional Compositing and Visual Effects - page 414

TheCameraTrackernodeisonlyavailableinNukeX—amoreexpensivelicenseforNuke
which enables some advanced features. The good thing is that only the processing part of
the Camera Tracker is disabled in standard Nuke, so you can run your track on a machine
with the NukeX license, but then use it in standard copies of Nuke ( FIGURE 10.1 ) .
Figure 10.1. The Camera Tracker is a NukeX only feature.
Note
Parallaxistheapparentchangeinthepositionofobjectsatdifferentdistances
that results from changing the camera's position. If you move your head left
and right, you will see that objects close to you are moving faster than things
farawayfromyou.Thisphenomenon isusedtofigureoutdistance incamera
tracking technology.