TECHNOLOGIES BEHIND 3D MOVIES

Dinesh Ganotra

each of the two eyes sees a scene from a slightly different perspective

Disparity

As a result of the spacing of the eyes, each of the two eyes sees a scene from a The brain combines these images, using the differences to create one scene with spatial information.

Not everyone has this ability. Some people do not have stereoscopic vision.

Stereo view

Effective ranges of depth cues

10 cm 1m 10m Distance

Accommodation

Convergence

Binocular parallax

Takanori Okoshi, Three dimensional imaging techniques, Academic press, 1977

Depth perception is very ambiguous and is easily deceived.

Single Lens Stereo Camera

Two Color method

Parallax Stereogram

IMAX Samsung

Pace Fusion 3D Camera

The Pace Fusion 3D digital camera, used by James Cameron has two lenses side by side; the dual signals from the camera are sent by cable to a remote storage system. The camera's lenses can be positioned a variable distance apart for different shooting circumstances.

Brewster Stereoscope

Holmes Streoscope

Head Mount Displays

Polarization

Linear , Circular , Elliptical

Polarization

Contrast Ratio

Real D's circularly polarized, but one lens is right-circularly polarized and the other left-circularly polarized.Dolby 3D glasses use multiple coatings on each lens to filter out particular frequencies of light;.

XpanD X102 – DLP®-Link 3D

Passive Glasses Linearly Polarized

glasses Circularly Polarized

glasses The user can tilt his head

and still maintain the left and right separation

Anaglyphs

Infitech glasses filters divide the visible color

spectrum into six narrow bands - two in the red region, two in the green region, and two in the blue region (called R1, R2, G1, G2, B1 and B2 for the purposes of this description). The R1, G1 and B1 bands are used for one eye image, and R2, G2, B2 for the other eye.

Dolby 3D

A spinning filter wheel to alternate rapidly between two slightly different sets of primary colors. Corresponding filters on 3D glasses only let the appropriate light into the left or right eye after the light reflects off the screen. The filter wheel is synchronized with the digital projector, which switches back and forth between the images for the left and right eyes six times per frame, or 144 times per second.

Keystone Distortion

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