2. A movement of a limb or
the body as an expression
Of thought or feeling.
--Oxford Concise Dictionary 1995
3. Offline gestures: Those gestures that are
processed after the user interaction with the
object. An example is the gesture to activate a
menu.
Online gestures: Direct manipulation
gestures. They are used to scale or rotate a
tangible object.
4. Interaction with computers are not
comfortable experience.
Computers should communicate with people
with body language.
Hand gesture recognition becomes important
Interactive human-machine interface and
virtual environment
5. Replace mouse and keyboard
Pointing gestures
Navigate in a virtual environment
Interact with a 3D world
No physical contact with computer
Communicate at a distance
11. Depth-aware cameras. Using specialized cameras
such as time-of-flight cameras, one can generate a
depth map of what is being seen through the
camera at a short range, and use this data to
approximate a 3d representation of what is being
seen.
Controller-based gestures. These controllers act
as an extension of the body so that when gestures
are performed, some of their motion can be
conveniently captured by software.
Single camera. A normal camera
12. Two common technologies for hand gesture
recognition are:
glove-based method
Using special glove-based device to extract
hand posture
Annoying
vision-based method
3D hand/arm modeling
Appearance modeling
13. Data gloves provide very accurate
measurements of hand-shape
But are cumbersome to wear
Expensive
Connected by wires- restricts freedom of
movement
14.
15. Requirements:
2D Gesture Recognition System:
• A simple webcam capable of acquiring
RGB images
3D Gesture Recognition System:
• Two simple webcams capable of
acquiring RGB images
• A mainboard capable of handling two
webcams
No special equipment required
24. Computer Interface
A 2D/3D input device (Hand Tracking)
Translation of gestures to commands
More natural interface for 3D design applications
Aid for disabled and deaf people
Sign language analysis, translation
Sign language teaching
Using multimodality to enable communication
between disabled people
Entertainment
Applications involving hand gesture recognition,
from computer games to sound and image design
applications
25. Sign language recognition
For socially assistive robotics
Directional indication through pointing
Control through facial gestures
Alternative computer interfaces
Remote control computing
26. Gesture Based Recognition uses sensing
technology to identify a user's actions and to
extract key information. This information is then
analyzed to determine the user's physical,
emotional, or informational state, which in turn
can be used to help make the user more
productive by performing expected actions or by
providing expected information. For example, a
Blue Eyes-enabled television could become
active when the user makes eye contact, at
which point the user could then tell the
television to "turn on".
