The augmented reality glasses use three-dimensional cameras that detect the structure and position of nearby objects. Software then uses that information to block out the background and highlight only what is nearest to the user.

via Smart glasses use 3D cameras to help visually impaired see | euronews, hi-tech.

Many people think any 3D image is a hologram – but most 3D images are not holograms at all.

Holograms are a specific method of storing light wave interference patterns on, say, 2D film, in a such a way that when a light passes through the film, the original true 3D image is recreated. A 3D hologram can viewed – glasses free – from any position. It’s not a stereoscopic image.

Researchers are developing true holographic displays based on acoustically modulated crystals that change their refraction. It’s a very clever idea.

Cheap Holograms Could Give Rise to Glasses-Free 3D TVs.

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Can track multiple finger movements simultaneously in 2D, plus 3D “air gestures” for use as input to computer systems: DM160225 – 3DTouchPad – DM160225 | Microchip Technology Inc..