This paper describes two systems constructed for the purpose of convertingpaper and filmdocumentstotheir numerical control or digital equivalent. One retools printing wiring board phototools, and the otherrecreates 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 generalpattem recognition problems and solutions.
Robert H. Thibadeau, Dale M. McNulty