Two Systems for Converting Raster Data to Numerical Control Data

This paper describes two systems constructed for the purpose of converting paper and film documents to their numerical control or digital equivalent. One retools printing wiring board phototools, and the other recreates pen-recorder signals contained in oil well logs. Instead of focusing on particular algorithms, we compare and contrast the two system architectures, their functions, and the way they perform in their respective domains. The aim is to understand fundamental similarities that might suggest general pattem recognition problems and solutions.