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Open Source Typefaces: OCR-A Font

Open Source Typefaces: OCR-A Font


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About the Book

Chapters: Ocr-A Font. Source: Wikipedia. Pages: 63. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: In the early days of computer optical character recognition, there was a need for a font that could be recognized by the computers of that day, and by humans. The resulting compromise was the OCR-A font, which used simple, thick strokes to form recognizable characters. The font is monospaced, with the printer required to place glyphs cm ( inch) apart, and the reader required to accept any spacing between cm ( inch) and cm ( inch). The OCR-A font was standardized by the American National Standards Institute (ANSI) as X3.4-1977. X3.4 has since become the INCITS and the OCR-A standard is now called ISO 1073-1:1976. There is also a German standard for OCR-A called DIN 66008. All of these standards are copyrighted, and none have been placed on the World Wide Web with the permission of the copyright holders. 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. Bureau of Standards. 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. As metal type gave way to computer-based typesetting, Tor Lillqvist used MetaFont to describe the OCR-A font. That definition was subsequently improved by Richard B. Wales. Their work is available from CTAN. 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. In 2007, G rkan Seng n created a Debian package from this implementation. In 2008. Luc Devroye corrected the vertical positioning in John Sauter's implementation, and fixed the name of lower case z. Independently, Matthew Skala used mft...More: http: //booksllc.net/?id=1503799


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Product Details
  • ISBN-13: 9781156553602
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • Sub Title: OCR-A Font
  • Width: 229 mm
  • ISBN-10: 1156553601
  • Publisher Date: 15 Sep 2010
  • Binding: Paperback
  • Spine Width: 4 mm
  • Weight: 104 gr


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