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Oliver, Garth R.; Waite, Jerry J. – Technology Teacher, 2006
For more than 150 years, printers have been faithfully reproducing continuous tone originals using halftoning techniques. For about 120 years, printers could only use the AM halftoning technique invented by Henry Talbot. In recent years, the advent of powerful raster image processors and high-resolution output devices has increased the variety of…
Descriptors: Technology Education, Computer Peripherals, Technological Advancement, Teaching Methods
Olivas, Jerry – Classroom Computer Learning, 1989
Discusses image scanning and optical character recognition. Describes how computer scanners work. Summarizes scan quality, scanning speed requirements, and hardware requirements for scanners. Surveys the range of scanners currently available. (MVL)
Descriptors: Computer Graphics, Computer Peripherals, Computer Uses in Education, Display Systems