英语翻译WITH the ubiquity of new information technology and medi

英语翻译
WITH the ubiquity of new information technology and media,more effective and friendly methods for human computer interaction (HCI) are being developed which do not rely on traditional devices such as keyboards,mice,and displays.Furthermore,the ever decreasing price/performance ratio of computing coupled with recent decreases in video image acquisition cost imply that
computer vision systems can be deployed in desktop and
embedded systems [111],[112],[113].The rapidly expanding
research in face processing is based on the premise that
information about a user’s identity,state,and intent can be
extracted from images,and that computers can then react
accordingly,e.g.,by observing a person’s facial expression.
In the last five years,face and facial expression recognition
have attracted much attention though they have been
studied for more than 20 years by psychophysicists,
neuroscientists,and engineers.Many research demonstrations
and commercial applications have been developed
from these efforts.A first step of any face processing system
is detecting the locations in images where faces are present.
However,face detection from a single image is a challenging
task because of variability in scale,location,orientation
(up-right,rotated),and pose (frontal,profile).Facial
expression,occlusion,and lighting conditions also change the overall appearance of faces.
We now give a definition of face detection:Given an
arbitrary image,the goal of face detection is to determine
whether or not there are any faces in the image and,if
present,return the image location and extent of each face.
The challenges associated with face detection can be
attributed to the following factors:
.Pose.The images of a face vary due to the relative
camera-face pose (frontal,45 degree,profile,upside
down),and some facial features such as an eye or the
nose may become partially or wholly occluded.
.Presence or absence of structural components.
Facial features such as beards,mustaches,and
glasses may or may not be present and there is a
great deal of variability among these components
including shape,color,and size.
.Facial expression.The appearance of faces are
directly affected by a person’s facial expression.
.Occlusion.Faces may be partially occluded by other
objects.In an image with a group of people,some
faces may partially occlude other faces.
非常感谢了,我翻译不了,看得头都大了,而现在又急需要知道里面的东西,