First digital Mona Lisa
H. Philip Peterson, CDC Corp.
Computer History Museum, Boston, MA
In 1964, H. Philip Peterson used a CDC (Control Data Corporation) 3200
computer and a "flying-spot" scanner to create a digital representation of the
Mona Lisa. The image contained 100,000 pixels plotted using numerals, sometimes
overprinted, to approximate the required density and took 14 hours to
complete. [source: Computer History Museum]
The flying-spot scanner was invented by Manfred von Ardenne
in 1930. It was used for electronic television. The scanner of a cathode-ray
tube is a fast flying spot generated by an electron beam. The light spot
illuminates a picture and the passed or reflected light is converted into
picture signals by a photodiode.
At right is a close-up of Mona's right eye.
You can see the individual numbers, some printed over one another
to achieve the desired brightness/luminosity.
Inevitably, Mona appears in several of my own
back to history
Copyright 2005-2008 Paul DiLascia.
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