Intensity controlled and aperature defining image generating sys

Details Intensity controlled and aperature defining image generating sys Intensity controlled and aperature defining image generating sys

1986-05-23

1988-04-12

Shaw, Clifford C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358298, H04N 121

Patent

active

047378581

ABSTRACT:
Process, methods and apparati for improving accuracy and appearance of graphics scanner output. The term "scanner" is used generically to denote an output device (plotter), an input device (scanner), or a hybrid device (scanner-plotter) utilized to transfer optical data to or from a surface. A position correction system is employed to compensate for systematic position errors, or deliberately to introduce position distortions; a beam forming system is employed to reduce illumination power requirements and to compensate partially for motions of a pixel shaping apparatus transverse to the beam optical axis; an optimally chosen aperture shape is employed to form pixels which robustly eliminate or, under the tradeoffs possible for practical operation, minimize the jaggedness of lines and edges.

REFERENCES:
patent: 4468706 (1984-08-01), Cahill
patent: 4486788 (1984-12-01), Yamada

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