[GreenKeys] ascii art generation

[Simon Claessen]

Hello all,

whils studying the art of asciiart, I wondered how the overstrike was 
calculated, is there a lookuptable of the greylevels somewhere online? 
in a book about this subject dating from the mid 80's there was even a 
3times overstrike to get even deeper blacks. i would like to make a 
small c program to change a jpg to overstrike asciiart this way.
-- 
Met vriendelijke Groet,

Simon Claessen
drukknop.nl