“Bartlane cable picture transmission system”的意思、由来-开放百科全书

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Bartlane cable picture transmission system

释义

References

Bartlane cable picture transmission system was a technique invented in 1920 to transmit digitized newspaper images over submarine cable lines between London and New York. It was named after its inventors Harry G. Bartholomew and Maynard D. McFarlane^[1] and was first used to transmit a picture across the Atlantic in 1921.^[2] Using the Bartlane system, images could be transmitted across the Atlantic in less than three hours.{{clarify |reason=for how many pixels? |date=January 2010}} The images were initially coded with 5 gray levels, but this number was increased to 15 in 1929.^[1] At the transmitter, the pattern on the telegraph tapes were made using special printing devices and decoded into the image at the receiver using telegraph printers equipped with appropriate typefaces.^[3]

This system was also adapted with a photographic process in order to get more precise images in 1929, so that at the receiver the images were converted to a chemical medium.

References

1. ^¹{{cite web |url=http://www.digicamhistory.com/1906_1920.html |title=The Bartlane Transmission System |publisher=DigicamHistory.com |accessdate=7 January 2010| archiveurl= https://web.archive.org/web/20100210053055/http://www.digicamhistory.com/1906_1920.html| archivedate= 10 February 2010 | deadurl= no}}
2. ^{{cite web|url=http://www.hffax.de/history/html/bartlane.html|title=The Bartlane System|last=Rensen|first=Marius|publisher=hffax.de|accessdate=7 January 2010}}
3. ^{{cite book |last=González |first=Rafael |first2=Richard Eugene |last2=Woods |title=Digital image processing |publisher=Prentice Hall |year=2008 |edition=3 |isbn=978-0-13-168728-8}}

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