About
Low Vision Software
Speech
recognition
applications that have emerged over the last few years include voice
dialing (e.g., "Call home"), call routing (e.g., "I would
like to make a collect call"), domotic appliance control and content-based
spoken audio search (e.g. find a podcast where particular words were
spoken), simple data entry (e.g., entering a credit card number), preparation
of structured documents (e.g., a radiology report), speech-to-text processing
(text for OpenDocument word processors, emails...); in the cockpit of
some military fast jets (where it is generally referred to as Direct
Voice Input - DVI -).
Voice recognition, or better, speaker recognition is a related process
that attempts to identify the person speaking, as opposed to what is
being said.
A screen
magnifier, low vision software that interfaces with a computer's
graphical output to present enlarged screen content. It is a type of
assistive technology suitable for visually impaired people with some
functional vision; visually impaired people with little or no functional
vision usually use a screen reader.
Optical
character recognition, usually abbreviated to OCR,
is the mechanical or electronic translation of images of handwritten,
typewritten or printed text (usually captured by a scanner) into machine-editable
text.
OCR is a field of research in pattern recognition,
artificial intelligence and machine vision. Though academic research
in the field continues, the focus on OCR has shifted to implementation
of proven techniques. Optical character recognition (using optical techniques
such as mirrors and lenses) and digital character recognition (using
scanners and computer algorithms) were originally considered separate
fields. Because very few applications survive that use true optical
techniques, the OCR term has now been broadened to include digital image
processing as well.
Early systems required training (the provision of known samples of
each character) to read a specific font. "Intelligent" systems
with a high degree of recognition accuracy for most fonts are now common.
Some systems are even capable of reproducing formatted output that closely
approximates the original scanned page including images, columns and
other non-textual components.
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