Bartlane cable picture transmission system was a technique invented in 1920 to transmit
digitized newspaper image
DigitizationTech Target. (2011, April). Definition: digitization. ''WhatIs.com''. Retrieved December 15, 2021, from https://whatis.techtarget.com/definition/digitization is the process of converting information into a digital (i.e. computer- ...
s over submarine cable lines between London and New York. It was named after its inventors
Harry G. Bartholomew and
Maynard D. McFarlane and was first used to transmit a picture
across the Atlantic in 1921.
Using the Bartlane system, images could be transmitted across the Atlantic in less than three hours. The images were initially coded with 5
gray level
In digital photography, computer-generated imagery, and colorimetry, a grayscale image is one in which the value of each pixel is a single sample representing only an ''amount'' of light; that is, it carries only intensity information. Graysca ...
s, but this number was increased to 15 in 1929.
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
typeface
A typeface (or font family) is the design of lettering that can include variations in size, weight (e.g. bold), slope (e.g. italic), width (e.g. condensed), and so on. Each of these variations of the typeface is a font.
There are list of type ...
s.
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
Fax
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