Robert Greenstreet asked about video capture software and then output on
a dot matrix printer.
I have seen this done in different ways.
In 1976 during the MU engineers week we used a black and white vidicon
TV scanner attached to our PDP-11/20 to scan visitors to the image
analysis lab. We had the person sit in a chair, hold very still, and
then scanned 3 times using a color wheel to filter the image. We then
both displayed the image on a RAMTEK display and printed out the image
on a continuous feed printer. We used 3 printers each with different
color ribbons. Interesting image if the person moved between colors.
There are Panasonic dot matrix printers that have a single ribbon that
is 3 colors. I think they print a line with one color than reprint
without advancing each of the other colors. I think it was slow and
noisy. I've seen these used in the mall, some little kiosk. They were
prints on t-shirts.
I think there was a special version Printronix printer that was also
sold by DEC that had multicolor ribbons that would print color. I think
it had a wire thread in the ribbon that told the printer which color was
being printed. Maybe DEC LXY11 or P300/P600.
Mike
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