A simple on-line device for scanning photographs.
A cheap scanner, based on an x-y plotter, is described which has a resolution of 128 elements x 128 elements minimum. Digitisings obtained suggest that, at most, 20 grey levels can be resolved.
D003201:Computers; D005336:Fiber Optic Technology / Q000295:instrumentation; D009862:Online Systems; D010781:Photography