Page 210 - Intelligent Communication Systems

CHAPTER 12 /COMPUTER VISION 179
match the viewer's perspective. To do this, the shape or color of the object is
acquired by computer vision. When the shape of the object is detected, a wireframe
model of the object is created and stored in a computer.
Research on synthesis of the human face in real time with realistic sensations
is being carried out. To reproduce a human face and its texture in real time using
a wireframe model, facial expressions need to be detected. To accomplish this,
markers are put around the mouth and eyes. The movement of the markers is
detected and facial expressions are determined. Then the wireframe model of the
face is adjusted and texture mapped and displayed on screen stereoscopically,

12.5.2 Gesture Recognition
Hand gestures are recognized by wearing a data glove with a sensor. Hand shape
is also detected by the data glove. Hand position is detected by a sensor attached
to the glove.
Research on gesture recognition without any kinds of devices is being carried
out. For example, using two cameras, the left image of a hand shape and the right
image are taken. Using the hand shape model, pattern matching between the images
taken by camera and the model is performed and a hand shape detected. Two
cameras are used to avoid obstruction of the hand shape.