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Proceedings Paper

Laser Scanner/Recorders For Image Transmission And Computer Processing
Author(s): W. F. Schreiber; U. F. Gronemann; D. E. Troxel
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Paper Abstract

Image processing by computer or otherwise requires cost-effective means of scanning and recording high quality images and of interfacing the imaging devices with computers and communication channels. Based on our previous work in newspaper facsimile and computer editing of news photos, we have developed a large-format high-resolution system, interfaced to a PDP-11 processor as well as the Bell DDS Communications channel which operates at 56 kB/s. One configuration, suitable for medical X-rays, features variable resolution up to 250 pels/inch over 14 inches and 1000 pels/inch over 4 inches and a 256 step density scale. Dry silver film with on-line development produces ready-to-use output of high diagnostic usefulness. The technology used includes low-power internally modulated HeNe lasers, pre-objective scanning with a galvanometer-driven mirror, a flat-field paper/film drive, and silicon photodetectors. This work was supported by NIGMS Grant 5 P01-GM19428-03S1 and by USPHS Grant GM018674 (through the Departments of Radiology of Peter Bent Brigham Hospital and Beth Israel Hospital).

Paper Details

Date Published: 30 October 1975
PDF: 8 pages
Proc. SPIE 0066, Efficient Transmission of Pictorial Information, (30 October 1975); doi: 10.1117/12.965362
Show Author Affiliations
W. F. Schreiber, Massachusetts Institute of Technology (United States)
U. F. Gronemann, Massachusetts Institute of Technology (United States)
D. E. Troxel, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 0066:
Efficient Transmission of Pictorial Information
Andrew G. Tescher, Editor(s)

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