System for image production by variable scanning

Details System for image production by variable scanning System for image production by variable scanning

1987-12-04

1989-09-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358113, H04N 701

Patent

active

048686573

ABSTRACT:
A video imaging system comprising: a detector with an odd number of elements for the simultaneous scanning of a swath consisting of a corresponding odd number of parallel horizontal image lines; a variable vertical scanning device for causing the detector to scan the image repeatedly over an image frame; and a scan controller arranged to control the variable scanning device to select the scan rate to provide an overlap between adjacent swaths, and selectively to stagger in the vertical direction the starting points of successively scanned frames by a simple fraction, for example 1/2, of the perpendicular distance (.alpha.) between adjacent image lines. The scan controller is capable of effecting either an interlaced scan or a non-interlaced scan without the need to switch mechanical or optical components of the imaging system.

REFERENCES:
patent: 4222065 (1980-09-01), Pusch
patent: 4262119 (1981-04-01), Bridges et al.
patent: 4419692 (1983-12-01), Modisette et al.
patent: 4477834 (1984-10-01), Beaumont et al.

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