Head-Coupled Perspective is the poor man's (well, relatively poor - iPad 2s are $500) implementation of sfnal gear like Heinlein's stereo tank. Now, lament the poverty of this merely two-dimensional video.
(Head-Coupled Perspective For iPad 2)
Head-Coupled Perspective (HCP) on mobile devices allows to create a glasses-free monocular 3D display. It is based on a efficient head-tracker that uses the front-facing camera of the device. We use an off-axis projection in order to adapt the perspective of the 3D scene according to the head's position of the user. Such spatially-aware mobile display enables to improve the possibilities of interaction.
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'...points and patches of light... sliding all over their faces in a programmed manner that had been designed to foil facial recognition systems.'
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'You had to live -- did live, from habit that became instinct -- in the assumption that every sound you made was overheard...'