In regard to 3D still pictures or video images, "full parallax" refers to a viewpoint chosen at will by the user, that is, not simply the viewpoint offered by the image-capturing camera itself.
3D video imaging that can be viewed in full parallax is called "full-parallax" video.
Since height, orientation, and distance of the viewpoint in relation to the subject can be adjusted, the user can view the subject from the angle they desire.