Scanners - a survey of current technology and future needs
Emmanuel P. Baltsavias, Ralf Bill · Repository for Publications and Research Data (ETH Zurich) · 1994
Scanners are necessary for retrieving digital information from analogue imagery or maps.In the context of this paper, we will discuss scanners as input devices for softcopy photogrammetric systems, which ask for high radiometric and geometric quality for the scanning process.Thus, the major emphasis in this paper lies on photogrammetric scanners.In addition, some cheaper alternatives are also discussed.This paper presents a classification and overview of scanners, some important scanner aspects and requirements, and scanner specifications for photogrammetric tasks.