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, software for low visionthat 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.
