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How do screen-reading devices work?

Topic status: answered

 » Health & Aids
Landesflagge: US
the_Unique
Topic creator
Posts: 28
How do screen-reading devices work?
Written on: 01/02/2010 [19:02]
Die Website für Menschen mit Behinderung und schwerer Krankheit / Community for disabled people
Landesflagge: GB
Steven
Posts: 21
Numerous devices and computer software make screen surfaces accessible for blind and visually impaired users. Screen-reading software e.g. reads the content of a page and displays it through a voice output device or a Braille display. The output of the information of the page is not restricted to text. Also graphical elements such as menu selection, symbols or windows can be displayed. However, the elements can be set individually with most software products. The biggest advantage of screen-reading devices is within the reading and use of websites. If they are designed barrier-freely.

Voice output device or Braille
The output of information can be displayed by a voice output device or a Braille display. The voice output de-vices produce synthetic speech which is usually quite monotonous. New software programs have different voices which can be chosen individually, also the speed and gender of the voice can be chosen. Braille displays display the information of the screen in the point writing of Braille. Adjustable pins represent the Braille points which are felt=read by the user by fingertips. Addition-ally to the Braille display for reading texts, there are often special Braille modules that display status infor-mation or character formatting. Braille displays are usu-ally used together with voice output devices.

Enlarging software
Enlarging software present screen information in a more suitable form for visually impaired people. The software magnifies the screen contents and also uses special col-our and contrast settings. In addition, the software allows the control of the enlarged section and also the monitoring of the not shown section. Usually, the soft-ware can be combined with a voice output device or a Braille display.

Text magnifying screen-reading device
For visually impaired people for whom reading of exten-sive text documents is too hard, there are special screen-reading devices. They record the documents (books, newspaper, letters etc.) with a camera and dis-play them greatly enlarged on a screen. The document or other objects are placed under a camera and moved by hand horizontally or vertically to follow the text.
The section under the camera is displayed on a screen which can be adjusted to the different types of visual impairment.
Written on: 06/02/2010 [13:13]
Die Website für Menschen mit Behinderung und schwerer Krankheit / Community for disabled people