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.
