The ISO standard ISO 2033:1983, and the corresponding Japanese Industrial Standard JIS X 9010:1984 (originally JIS C 6229-1984), define character encodings for OCR-A, OCR-B and E-13B. Unicode contains ASCII and has special provisions for OCR characters, so some implementations of OCR-A have looked to Unicode for
The modern descendant of ASCII is Unicode, also known as ISO 10646. However, for convenience and efficiency all of the glyphs were expected to be accessible in a single font using ASCII coding, with the additional characters placed at coding points that would otherwise have been unused. Not all of the glyphs of OCR-A fit into ASCII, and for five of the characters there were alternate glyphs, which might have suggested the need for a second font.
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When OCR-A was being standardized the usual character coding was the American Standard Code for Information Interchange or ASCII. For a computer to use a font, each glyph must be assigned a code point in a character set. Additionally, OCR-A is used for the film 13 Hours: The Secret Soldiers of Benghazi.Ī font is a set of character shapes, or glyphs.
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Notably, it is used for the subtitles in films and television series such as Blacklist and for the main titles in The Pretender. Also, because of its unusual look, it is sometimes used in advertising and display graphics. Some lock box companies still insist that the account number and amount owed on a bill return form be printed in OCR-A. Its usage remains widespread in the encoding of cheques around the world. Use Īlthough optical character recognition technology has advanced to the point where such simple fonts are no longer necessary, the OCR-A font has remained in use. It was used in a "technology"-themed section of Rolling Stone. As a joke, Tobias Frere-Jones in 1995 created Estupido-Espezial, a redesign with swashes and a long s.
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In addition to these free implementations of OCR-A, there are also implementations sold by several vendors.
On September 27, 2012, he updated his implementation to version 0.2. In 2011 he released a new version created by rewriting the Metafont definitions to work with METATYPE1, generating outlines directly without an intermediate tracing step. Independently, Matthew Skala used mftrace to convert the Metafont definitions to TrueType format in 2006. Luc Devroye corrected the vertical positioning in John Sauter's implementation, and fixed the name of lower case z. In 2007, Gürkan Sengün created a Debian package from this implementation. To make the free version of the font more accessible to users of Microsoft Windows, John Sauter converted the Metafont definitions to TrueType using potrace and FontForge in 2004. That definition was subsequently improved by Richard B. Īs metal type gave way to computer-based typesetting, Tor Lillqvist used Metafont to describe the OCR-A font. The design is simple so that it can be easily read by a machine, but it is more difficult for the human eye to read.
In 1968, American Type Founders produced OCR-A, one of the first optical character recognition typefaces to meet the criteria set by the U.S. There is also a German standard for OCR-A called DIN 66008. X3.4 has since become the INCITS and the OCR-A standard is now called ISO 1073-1:1976. The OCR-A font was standardized by the American National Standards Institute (ANSI)Īs ANSI X3.17-1981.
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