Perceptual User Interface (PUI) is one kind of technology
that allows user to interact with computer without using other forms of aids
such as keyboard and mouse. It is extremely useful for people have physical
difficulties to use computers and it has become a very popular subject in
computing department in most of universities.
When I was doing my undergraduate, I have studied a course
called computer vision. Computer vision is a field that includes methods for
acquiring, processing, analysing, and understanding images and, in general,
high-dimensional data from the real world in order to produce numerical or
symbolic information[1].
During the course, we were required to develop a graphical
user interface that would allows user interact with the system by pointing with
their finger. Basically, we set up a
camera and record the movement of our fingers, the camera was connecting with
computer so it was sending the live video to the computer at the same time. What
the program does is tracing the tip of the finger (please see the picture below, there is a red arrow at the tip of the finger on the right window) when the finger is moving in
the video simultaneously. This program is very helpful for disabled people that
cannot use the keyboard or mouse. For example, if a disabled person wants to
tell computer to open a website, he/she can just by pointing his/her finger to
a specific point which we can pre-define that point is ‘internet’ browser
point, so the computer can open web browser automatically. It does sounds similar to iphone, but the
difference is to use Iphone’s touch screen, the user will need to touch the
screen physically. However, the program I developed does not even need the user
to touch the screen at all. This is much cooler as you can control your
computer remotely without any physical touch!
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