What is a Character-recognition Device?
One type of character-recognition device enables the user to input text and numerical data by handwriting it in capital letters on the pressure-sensitive surface using a specials pen. An invisible grid of fine wires below the surface detects the shape of the letters, converting them to electrical signals which the computer interprets using special software. Although this device is a genuine replacement for the keyboard, it has never become as popular as keyboard. It has been overtaken by other developments, in particular the advances being made in speech-recognition devices.
Some modern image scanners can be also function as Optical Character Readers (OCRs) when used with special OCR software. These can recognize a reasonable range of typefaces, so enabling printed and typed text to be input to a computer. However, smeared character and unusual typefaces may be beyond them. In place of a character that they cannot recognize, they will substitute a special symbol. These symbols can be automatically picked out and replaced later on with the aid of spell-checking software.
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