2. CONTENTS
Introduction
Definition of gesture
Basic working of gesture
Gesture recognition
Types of gestures
Advantages
Disadvantages
Conclusions and future trends
3. WHAT IS GESTURE?
A gesture is a form of non-verbal
communication in which visible bodily
actions communicate particular messages,
either in place of speech or together and in
parallel with words.
Gestures include movement of the hands, face,
or other parts of the body.
Gestures are an important aspect of human
interaction, both interpersonally and in the
context of man-machine interfaces.
4. EXAMPLE
Military air marshals use hand and body
gestures to direct flight operations aboard
aircraft carriers.
5. INTRODUCTION
Gesture recognition can be seen as a way for
computers to understand human body
language, thus building a richer bridge
between machines and humans than primitive
text user interfaces or even GUIs (graphical
user interfaces), which still limit the majority
of input to keyboard and mouse.
6. INTRODUCTION
Gesture recognition enables humans to interface with the
machine and interact naturally without any mechanical
devices.
Using the concept of gesture recognition, it is possible to
point a finger at the computer screen so that the cursor
will move accordingly.
Gesture recognition can be conducted with techniques
from computer vision and image processing.
9. Input Devices
WIRED GLOVE
DEPTH AWARE CAMERA
STREO CAMERA
CONTROLEED GESTURES
10. What Are Gesture
Recognition?
Interface with computers using gestures of the
human body, typically hand movements.
Gesture recognition is an important skill for
robots that work closely with humans.
Gesture recognition is especially valuable in
applications involving interaction
human/robot for several reasons.
11. EXAMPLE
A child being
sensed by a
simple gesture
recognition
algorithm
detecting hand
location and
movement.
12. TYPE OF GESTURES
There are many types of gesture recognition but some types are explain
following:
Hand gesture recognition
Vision gesture recognition
Sign language recognition
Electrical field recognition etc..
13. Hand Gesture Recognition
Hand gesture recognition acts
as a highly adaptive interface
between machines and their
users.
Hand gesture recognition
technology allows operation
of complex machines using
only a series of finger and
movements, eliminating
for physical contact between
operator and machine.
14. Vision Gesture Recognition:
There are two approaches to vision based gesture
recognition:
Model based techniques:
They try to create a three
dimensional model of the users
hand and use this for recognition.
Image based methods:
Image-based techniques detect a
gesture by capturing pictures of
a user’s motions during the course of a gesture.
Scientist : Stefan hocking
15. Sign Language Recognition
Just as speech recognition can transcribe speech to
text, certain types of gesture recognition software
can transcribe the symbols represented through
sign language into text.
These measurements can be used to measure the
distance of a human hand or
other body part from an object;
this facilitates a vast
range of applications for a
wide range of industries.
16. Virtual controllers
For systems where the act of finding or
acquiring a physical controller could require
too much time, gestures can be used as an
alternative control mechanism. Controlling
secondary devices in a car, or controlling a
television set are examples of such usage.
17. Remote control
Through the use of gesture recognition, remote control with
the wave of a hand of various devices is possible.
18. Electrical Field Recognition
Proximity of a human body or body part can be
measured by sensing electric fields .
These measurements can be
used to measure the distance
of a human hand or other
body part from an object;
this facilitates a vast range
of applications for a wide
range of industries.
Example : cell phone light
19. Advantage Of Gesture
Speed and sufficient reliable for recognition system. Good
performance system with complex background.
The system successfully recognized static and dynamic
gestures. Could be applied on a mobile robot control.
Simple, fast, and easy to implement. Can be applied on real
system and play games.
No Training is required.
20. Advantage Of Gesture
Replace mouse and keyboard
Pointing gestures
Navigate in a virtual environment
Pick up and manipulate virtual objects
Interact with the 3D world
No physical contact with computer
Communicate at a distance
Information can be easily presented in non-verbal
communication through using visual, audio-visual
and silent means of non-verbal communication.
21. Non-verbal message may substitute for the
verbal message especially if it is blocked by
noise, interruption, long distance etc. for
example: gestures-finger to lips to indicate
need for quite, facial expressions- a nod
instead of a yes.
Non-verbal cues of communication greatly
help in handicapped people especially to deaf
people. Deaf people are exchange message
through the movements of hands, fingers, eye
ball
22. -
The message of non-verbal communication
reached the receiver very fast. For this
reason it reduces the wastage of valuable
time of the communicator.
Non-verbal cues of communication like
sign and symbol can also communicate
some messages very quickly than written
or oral messages.
23. Disadvantage of gesture
Irrelevant object might overlap with the hand. Wrong object
extraction appeared if the objects larger than the hand.
Performance recognition algorithm decreases when the
distance is greater than 1.5 meters between the user and the
camera.
24. Disadvantage Of Gesture
System limitations restrict the applications such as the arm
must be vertical, the palm is facing the camera and the
finger colour must be basic colour such as either red or
green or blue.
Ambient light affects the colour detection threshold
25. Non-verbal communication is quite vague and
imprecise. Since in this communication there
is no use of words or language which
expresses clear meaning to the receiver. No
dictionary can accurately classify them. Their
meaning varies not only by culture and
context but by degree of intension.
In non-verbal communication, long
conversation and necessary explanations are
not possible. No party can discuss the
particular issues of the messages.
26. In some cases non-verbal communication
involves huge cost. For example, neon
sign, power point presentation, cinema etc
are very much costly compared to others
form of communication.
verbal communication does not follow any
rules, formality or structure like other
communication. Most of the cases people
unconsciously and habitually engaged in
non-verbal communication by moving the
various parts of the Non- body.
27. Conclusion
The importance of gesture recognition lies in
building efficient human machine interaction. Its
applications range from sign language recognition
through medical rehabilitation to virtual reality.
Gesture recognition 35 Soft computing tools pose
another promising application to static hand
gesture identification.. Thus, gesture recognition
promises wide-ranging applications in fields from
photojournalism through medical
technology to biometrics.
28. Future trands
The future of this technology is hard to predict because with
any technology, it is always changing. The horizon is a little
blurry but one can make the assumption that it will only
continue to develop and eventually turn into voice command
technology. These two have already been integrated together
but the point of technology is to be able to use it without
thinking about it. Whatever that secret may be is what the
future is going to be. Wearable tends to be the forerunner
right now with Google glass becoming popular and the
rumor of Apple releasing an iWatch next year
29. . It will be interesting to see where technology
takes us because it is just as important to
remember to stay human. Google has also been
talking about making a car and with the Seri
integration in others; technology and our
phones have entered into every part of our
lives. Perhaps there will come a day we will be
able to speak things and they will just happen
all in part to devices being able to completely
understand our meanings.
