The ever-increasing presence of computers in
everyone’s lives has generated an awareness of the
need to address computing requirements for those
who have or may develop physical limi tations.
The Americans with Disabilities Act (ADA)
requires any company with 15 or more employees
to make reasonable attempts to accommodate the
needs of physically challenged workers.
Besides voice recognition, which is ideal for
blind or visually impaired users, several other
input devices are available. A keyguard is a metal
or plastic plate placed over the keyboard that
allows users to rest their hands on the keyboard
without accidentally pressing any keys. A keyguard
also guides a finger or pointing device so
that a user presses only one key at a time.
Keyboards with larger keys also are available
(Figure 5-44). Still another option is
the on-screen keyboard, in which a graphic of
a standard keyboard is
displayed on the user’s
screen.Various pointing devices are available for
users with motor disabilities. Small trackballs
that the user controls with a thumb or one finger can be attached to a table, mounted to
a wheelchair, or held in the user’s hand. Another
option for people with limited hand movement
is a head-mounted pointer to control the pointer
or insertion point (Figure 5-45). To simulate the
functions of a mouse button, a user works with
switches that control the pointer. The switch
might be a hand pad, a foot pedal, a receptor
that detects facial motions, or a pneumatic
instrument controlled by puffs of air.
Two exciting developments in this area are
gesture recognition and computerized implant
devices. Both in the prototype stage, they
attempt to provide users with a natural computer
interface. With gesture recognition, the computer
will detect human motions. Computers with
gesture recognition capability have the potential
to recognize sign language, read lips, track facial
movements, or follow eye gazes. For paralyzed
or speech impaired individuals, a doctor will
implant a computerized device into the brain.
This device will contain a transmitter. As the use
r
thinks thoughts, the transmitter will send signals
to the computer. Read Looking Ahead 5-1 for a
look at a tongue-powered input device.
A camera/receiver mounted on the
monitor tracks the position of the head-mounted
pointer, which is reflective material that this user is
wearing on the brim of her hat. As the user moves
her head, the pointer on the screen also moves.
everyone’s lives has generated an awareness of the
need to address computing requirements for those
who have or may develop physical limi tations.
The Americans with Disabilities Act (ADA)
requires any company with 15 or more employees
to make reasonable attempts to accommodate the
needs of physically challenged workers.
Besides voice recognition, which is ideal for
blind or visually impaired users, several other
input devices are available. A keyguard is a metal
or plastic plate placed over the keyboard that
allows users to rest their hands on the keyboard
without accidentally pressing any keys. A keyguard
also guides a finger or pointing device so
that a user presses only one key at a time.
Keyboards with larger keys also are available
(Figure 5-44). Still another option is
the on-screen keyboard, in which a graphic of
a standard keyboard is
displayed on the user’s
users with motor disabilities. Small trackballs
that the user controls with a thumb or one finger can be attached to a table, mounted to
a wheelchair, or held in the user’s hand. Another
option for people with limited hand movement
is a head-mounted pointer to control the pointer
or insertion point (Figure 5-45). To simulate the
functions of a mouse button, a user works with
switches that control the pointer. The switch
might be a hand pad, a foot pedal, a receptor
that detects facial motions, or a pneumatic
instrument controlled by puffs of air.
Two exciting developments in this area are
gesture recognition and computerized implant
devices. Both in the prototype stage, they
attempt to provide users with a natural computer
interface. With gesture recognition, the computer
will detect human motions. Computers with
gesture recognition capability have the potential
to recognize sign language, read lips, track facial
movements, or follow eye gazes. For paralyzed
or speech impaired individuals, a doctor will
implant a computerized device into the brain.
This device will contain a transmitter. As the use
thinks thoughts, the transmitter will send signals
to the computer. Read Looking Ahead 5-1 for a
look at a tongue-powered input device.
A camera/receiver mounted on the
monitor tracks the position of the head-mounted
pointer, which is reflective material that this user is
wearing on the brim of her hat. As the user moves
her head, the pointer on the screen also moves.
Hi. I’m Designer of Blog Magic. I’m CEO/Founder of ThemeXpose. I’m Creative Art Director, Web Designer, UI/UX Designer, Interaction Designer, Industrial Designer, Web Developer, Business Enthusiast, StartUp Enthusiast, Speaker, Writer and Photographer. Inspired to make things looks better.
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