A vector to raster converter system in which vectors are delivered to the system and stored in a vector memory in groups. Each group includes all vectors which have at least a portion in a particular area of the output plot called a vector band. Vectors are serially read out of the vector memory and...http://www.google.com.hk/patents/US4458330?utm_source=gb-gplus-share專利 US4458330 - Banded vector to raster converter
