This document discusses 3D technology and 3D television. It begins with an acknowledgement and introduction. It then covers the history of 3D, how humans see 3D, and how to create 3D images using two cameras. Common 3D display techniques are described, including viewing through glasses like anaglyph, polarization, and active glasses. Auto-stereoscopic displays without glasses using lenticular lenses or parallax barriers are also discussed. The document concludes with sections on the architecture and transmission of 3D TV, applications, and advantages and disadvantages.

1. Technocrats Institute Of
Technology
[Excellence]

4. ACKNOWLEDGEMENT
We would like to express our special thanks of gratitude to
our HOD Ma’am Mrs. Hema Singh and to our TG
Mr. Gaurav Mittal for giving us the golden opportunity to
do this wonderful project on the topic-
“3D Technology
which also helped us in doing a lot of Research and we
came to know about so many new things.

5. Contents
 Introduction
 History
 How we see 3D
How to create 3D ?
 Common 3D display technique
 Viewing through glass
 Anaglyphic 3D
 Polarization 3D
Active glasses
Auto stereoscopic display
 Lenticular lenses
 Parallax barrier
 Architecture of 3D TV
 Transmission
3D display
Application
Advantages and disadvantage

6. Introduction
 A 3D television is a television that employs techniques
of 3D presentation, such as stereoscopic capture,
multi-view capture, or 2D plus depth, and a 3D
display a special viewing device to project a television
program into a realistic three-dimensional field.
 Three dimensional TV is expected to be next
revolution in the TV history.

7. The stereoscope was first
invented by
Sir Charles
Wheatstone in 1838.
 Stereoscopic 3D television was
demonstrated for the first time
on 10 August 1928.
 A stereoscope is a device for
viewing a stereoscopic pair of
separate images, depicting lefteye and right-eye views of the
same scene, as a single threedimensional image.

History

8. How we see 3D
Basic principle tricking our dumb, binocular
brain into interpreting a 2Dimage into one
with depth.
A key part of this process is binocular
disparity. It means each eye has a slightly
different viewpoint.

9. When an object is far away, the light traveling
to one eye is parallel with the light traveling to
the other eye. But as an object gets closer, the
lines are no longer parallel --they converge and
our eyes shift to compensate.

10. How to create 3D?
 It involves the usage of two cameras (or a camera having
two lenses), placed side by side with the center of their
lenses spaced approximately and ideally, the same
distance as the space between our eyes.

11. Both cameras record in sync and the resulting left
and right eye videos or images are then edited and
presented to the viewer (in cinemas) via different
techniques.

12. Common 3D display
technology
 Projecting stereoscopic image pairs to the viewer include:
 Passive glass:
Anaglyphic 3D (with red-blue glasses)
Polarization 3D (with polarized glasses)
 Active glass: Alternate-frame sequencing
 Auto stereoscopic displays (without glasses)

13. Viewing through glasses
Two sets of images are meant to be seen by only
particular eye.
Hence each eye can only see one set of images,
your brain interprets this to mean that both eyes
are looking at the same object.
That's what creates the illusion of depth.

14. Anaglyphic 3D
Red-Blue glasses
There are two sets of images slightly offset from one another.
One will have a blue tint to it and the other will have a
reddish hue.
Anaglyph glasses use two different color lenses to filter the
images you look at on the television screen.
The two most common colors used are red and blue.

15. Polarization 3D
Polarized glasses
 Light waves of two images are projected at certain angles.
 Each lens only allows light to pass through that is polarized in
a compatible way.
 It is more popular than anaglyph glasses because the
polarization don't distort the color of the image.
 Hence it is popular in projector based display.

17. Active glasses
Alternate-frame sequencing
 An active glasses system
alternates between the
two sets of images at
very high speeds.
 Active glasses have
infrared (IR)sensors.
 As the 3-D content
appears on the screen,
the picture alternates
between two sets of the
same image.

18. Advantage of active glasses over
passive glasses
 It's easier to present 3-D in HD content using active glasses
than with passive glasses.
 That's because with a passive glass system, the television has
to display two sets of images at the same time.
 An active glasses system alternates between that two sets of
images at very high speeds--it's less information for the
television to handle at any particular moment.

19. Stereoscopic method leads to problems:
 The glasses are really cumbersome
and expensive, and you don't want to
accidentally sit on one or lose it. And
what to do when we don't have enough
lenses.
But still have
a problem
 Plus, it takes away the simplicity of
with
television as it stands today, where you
simply hit the remote and start
those glasses? watching.
 Also, without the glasses, any 3D
content is completely unusable.

20. Auto stereoscopic display
 Two main technologies that rely on it:
 Lenticular lenses

Parallax barrier

21. Lenticular lenses
 Basically A lenticular lens is an array of
magnifying or directing lenses, designed
so that when viewed from slightly
different angles, different images are
magnified.
 Lenticulars 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 your eyes each eye sees only
one image.

22. Parallax barrier

On a 3D screen, a very fine grating,
called a "parallax barrier", is placed in
front of the LCD screen.
 The parallax barrier is a fine grating of
liquid crystals placed in front of the
screen, with slits in it that correspond to
certain columns of pixels of the screen.
 It does the job of the polarizing glasses,
directing light from each image slightly
in different direction so that at a socalled "sweet spot" about 30 inches in
front of the screen the two images are
separated just enough that the brain will
create a composite 3D image.

23. Advantage of parallax barrier over
lenticular lenses
 Parallax barrier can be
switched on and off with ease
(one button on the remote is
all it would take), allowing the
TV to be used for 2D or3D
viewing.
So
on
a
computer monitor, you could
play video games in full 3D
and then easily switch to 2D
mode
for
your
work
requirements.

24. Architecture of 3D TV

25. Transmission
Gigabit Ethernet
 A transmission technology, enables super net to
deliver enhanced network performance.

27. Application of 3D TV
video games
 TV
 applications for physicists, scientists, and engineers
could also be extremely useful.
Richer ,Lifelike and entertaining experience than
2D TV for home users.
Future use in mobile.

28. ADVANTAGES AND DISADVANTAGES

29. Conclusion
 Thus we have seen various technologies used for 3D
imaging and viewing.
 We also explained technology of 3D TV, discussed various
aspects and features of 3D TV.

Another area of future research is precise colour
reproduction of natural scenes on multiview displays.
 In future we will be able to touch and smell the objects
being projected from a screen to the viewers.