3d display edited
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3D DISPLAYS
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What is 2D?
2D means the object that has two
dimensions, i.e. height and width.
What is 3D? 3D is a kindle of sense organexperience which means threedimensional, i.e. something thathas width, height and depth.
Introduction
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Binocular cuesprovide depth information whenviewing a scene with both eyes using"
*tereopsis+onvergence
*hadow *tereopsis
(f these various cues, only convergence,
accommodation and familiar si&e provide absolutedistance information. 'll other cues are relative.
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Techniques forAchieving 3D
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nag yph
In an anaglyph, the two images are superimposed throughtwo lters, one red and one cyan. -lasses with colored ltersin each eye separate the images by cancelling the lter colorout and rendering complementary color black.
'rchetypal 3D glasses
'n anaglyph image
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Polarization Method
wo images are projected and superimposed onto samescreen through di/erent polari&ing lters. )/ect is achieved
by wearing eyeglasses containing a pair of polari&ing lteroriented di/erently
' %ealD 3Dglasses
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Eclipse Method
' shutter blocks light from each appropriate eye whenthe converse eye0s image is projected on the screenwhich alternates between left and right images
+rystal)ye shutterglasses
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Autostereoscopy
It doesnt require any type of glasses or headgearand works on following two devices:-
Parallax Barrier
It consist of layer of material with series of
precision slit, allowing each eye to see a di/erentset of pixels, creating a sense of parallax.
!enticular Arrays
It uses a 2D array of small lenses to capture a
3D scene and is capable of creating window likedisplays that reproduce objects and scenes life1si&e, with full parallax and perspective shift.
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"onstruction
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' 3D display is any display device capable ofconveying three1dimensional images to the viewer.
Glasses
AutostereoscopicDisplay3DT
v!
"olography
3D DisplayDevice
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#ypes o$ 3D Displays
*tereoscopicDisplay
'uto *tereoscopicDisplay
olographicDisplay
olumetric Display
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%tereoscopic Display
*tereoscopic 3D displays show a di/erentimage to each eye.
In stereoscopic display human need glassesto see movie.
-lasses are available in various types . 'smany company developing glasses there ismany types of glasses are available inmarket.
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Metho# To $apture %i#eo &or StereoscopicDisplay
Object
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Active ShutterGlasses
&iltere#Glasses
#ypes o$ &lasses
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A'#( %#E)E(%"(PI"DI%P!A*
'uto *tereoscopic 3D Displays Dohis 4ithout he 5eed 6or 'ny
*pecial -lasses (r (ther ead -earand work on either $arallax 7arrier or8enticular 'rray.
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Wor+ing
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,olographic Display
It has ability to provide all four eyemechanism" binocular disparity,motion parallax, accommodationand convergence.
3D objects can be viewed withoutany special glasses.
5o visual fatigue
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he computer sends the image to the projector. heprojector generates light beams which form the image on
the screen.
4hen the user touches the screen, a tactile membrane lmreacts to these movements, generating electrical impulsesthat are sent back to the computer. he computer
interprets the received impulses and modies theprojected image according to the information.
#ethod for +omputer -eneratedolography:-
"o-puter &enerated
,olography
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he projector is usually located behind the screen andmust be placed a certain angle above or below the user9s
line of sight to avoid the da&&ling the user. herefore, itmust be trape&oidal projector, so it can compensate for
the deforming of the images at this angle ofdisplacement.
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olu-etric Displays
hey form a visual representation ofan object in three physicaldimensions, as opposed to the planarimage of traditional screens thatsimulate depth through a number ofdi/erent visual e/ects.
In Multiplanar #isplays , whichhave mutiple display planes stackedup.
In (otating Panel #isplays, arotating panel sweeps out a volume.
o project light dots in air, an infraredlaser is focused on the destination inspace, generating a small bubble ofplasma which emits visible light.
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#ypes
%/ept01olu-e display*wept1surface or :swept1volume:! is a volumetric display in
which the three1dimensional image is formed by illuminating arapidly moving display surface, which may be:macroscopically: physical e.g., a spinning di/user! orotherwise.
%tatic 1olu-ehey create imagery without any macroscopic moving parts
in the image volume. It is unclear if the rest of the system mustremain stationary for membership in this display class to be
viable.#o-ography
omography1based volumetric displays create 31D images
using a tomography approach by using multiple projectors torender a 31D image.
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Application o$ 3D Display
#echniues; -aming; )xhibitions, conferences; +onventions, fairs
; *how rooms;#ovies; 3D presentations )
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#han+
*ou....