The document discusses 3D display techniques. It describes how stereoscopy creates the illusion of depth by sending a separate image to each eye. Common techniques like anaglyph, polarization, and eclipse methods require special glasses. Newer glasses-free displays use autostereoscopy methods like lenticular sheets or parallax barriers to direct different images to each eye. While more expensive, auto stereoscopic displays allow 3D viewing without glasses. The document outlines applications of 3D in movies, cameras, gaming, and televisions.

1. 1
3D DISPLAY TECHNIQUE

2.  OVERVIEW
 What is 3D?
 Principle of 3D display.
 Stereoscopy
 Problems and their solution.
 Auto-stereoscopy.
 Applications.
•ANAGLYPH
•POLARIZATION
•ECLIPSE METHOD
•GUIDED LIGHT
•LENTICULAR SCREEN
•PARALLAX BARRIER
23D DISPLAY TECHNIQUE

3.  Stereoscopy (also
called stereoscopics or 3D imaging) is a
technique for creating or enhancing
the illusion of depth in an image by
means of stereopsis for binocular vision.
3D DISPLAY TECHNIQUE 3

4.  HUMAN VISION & PERCEPTION OF 3D WORLD
 Human eyes are equipped with an absolutely
amazing binocular vision system. For objects up to
about 20 feet (6 to 7 meters) away, the binocular
vision system lets us easily tell with good accuracy
how far away an object is.
 The binocular vision system relies on the fact that our
two eyes are spaced about 2 inches (5 centimeters)
apart. Therefore, each eye sees the world from a
slightly different perspective, and the binocular vision
system in our brain uses the difference to calculate
distance. Our brain has the ability to correlate the
images it sees in its two eyes even though they are
slightly different.
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5. 3D DISPLAY TECHNIQUE 5

6.  Main concept behind 3D
display is to generate a
sense of variation in
depth. To achieve this,
two perspective of a
single image, each for
one eye, is used. The
principle is to send an
individual image to each
eye. our eyes can
correlate these images
automatically because
each eye sees only one
of the images.
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7. 3D DISPLAY TECHNIQUE 7
WITH GLASSES
WITHOUT GLASSES

8. ANAGLYPH
In this system, two images are
displayed on the screen, one in red
and the other in blue (or cyan or
green). The filters on the glasses
allow only one image to enter each
eye, and our brain does the rest.
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9. 3D DISPLAY TECHNIQUE 9
ANAGLYPH

10. POLARIZATION
 To present stereoscopic images
and films, two images are
projected superimposed onto the
same screen or display through
different polarizing filters. The
glasses allow only one of the
images into each eye because
they contain lenses with different
polarization.
 DRAWBACK: It's very difficult to use
the polarization technique for
home theater systems -- most
methods would require to coat our
television screen with a special
polarizing film first.
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11.  ECLIPSE METHOD:
 An Eclipse compatible projector can
display full-color 3D images on any white
screen or surface. This format uses four
primary colors to superimpose the left and
right eye images.
 When one eye views the full-color image
and the other eye views the monochrome
image, the mind perceives a full-color
image (not half-color). The color comes
from the full-color image. The depth comes
from the monochrome image.
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12.  With the eclipse method, a shutter blocks
light from each appropriate eye when
the converse eye's image is projected on
the screen. The projector alternates
between left and right images, and
opens and closes the shutters in the
glasses or viewer in synchronization with
the images on the screen.
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13. 133D DISPLAY TECHNIQUE

14. The most common 3D displays
require users to wear special
glasses, which has limited the
technology’s popularity. Now
researcher and vendors are
working on glasses-free 3D displays.
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15.  Using auto stereoscopic displays to
generate 3D images without glasses.
 Autostereoscopy is a method of
displaying stereoscopic images
(adding binocular perception of 3D
depth) without the use of special
headgear or glasses.
 Because headgear is not required, it is
also called "glasses-free 3D" or "glasses
less 3D".
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16.  There are two broad classes of auto
stereoscopic displays:
1. Eye tracking (the process of measuring either
the point of gaze - where one is looking or the
motion of an eye relative to the head.)
2. Multi view ( A multi view display uses optics to
render two or more views of a scene, which the
user’s optical system fuses into single 3D image
3. .)
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17.  Guided light:
 This techniques use
special
holographic prisms
that organize
multiple high end
projectors output
into a single 3D
image.
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18. Lenticular sheet
This method relies on a display
coated with a lenticular film.
Lenticuler are tiny lenses on the
base side of a special film. The
screen displays two sets of the
same image. The lenses direct the
light from the images to our eyes --
each eye sees only one image.
Our brain puts the images together
and interpret it as a three-
dimensional image. 183D DISPLAY TECHNIQUE

19. 3D DISPLAY TECHNIQUE 19

20.  Parallax barrier:
 A parallax barrier is a device
placed in front of an image
source, such as a liquid crystal
display, to allow it to show a
stereoscopic image without 3D
glasses. Placed in front of the
normal LCD, it consists of a layer
of material with a series of
precision slits, allowing each eye
to see a different set of pixels, so
creating a sense of depth through
parallax in an effect similar to
what lenticular printing produces
for printed products.
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21. 3D DISPLAY TECHNIQUE 21

22.  Because they entail complex projection
and display technologies, auto
stereoscopic system cost substantially more
than traditional 3D displays.
 To render multiple viewing angles for a
group of users, lenticular and barrier
techniques lose resolution.
 Moreover they offer a limited number of
viewing angles from which users can see
3D images.
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23.  3D MOVIES
3D DISPLAY TECHNIQUE 23
CLASSIC
ANAGLYPH
TECHNIQUE
POLARISATION
TECHNIQUE

24.  3D CAMERA
3D DISPLAY TECHNIQUE 24
ACTIVE SHUTTER
CAPTURING

25.  3D GAMING
3D DISPLAY TECHNIQUE 25
ACTIVE SHUTTER
GLASS

26.  3D TV
3D DISPLAY TECHNIQUE 26
AUTO-STEREOSCOPY
ACTIVE SHUTTER GLASS

27.  With the constant development of 3D
technology and the new inventions of our
technological age the 3D glasses as we
know them will soon become a thing of the
past. So whether you are a fan of 3D or not
you simply can't deny that 3D without
glasses is the future of 3D vision. When it
becomes a common practice and
employed in the most devices all the last
doubts will fall away.

3D DISPLAY TECHNIQUE 27

28. 3D DISPLAY TECHNIQUE 28