Imaging system and method with reduced moire interference

Details Imaging system and method with reduced moire interference Imaging system and method with reduced moire interference

1980-04-23

1982-06-22

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358138, 358265, 358293, 358283, H04N 104, H04N 712, H04N 136

Patent

active

043365582

ABSTRACT:
System and method for forming a halftone image by scanning without visible moire interference. Alternate scan lines are sampled with clock signals of different phases to produce a displacement between adjacent scan lines in the output image. This displacement reduces the increase in spot width which would otherwise produce moire interference, with no increase in the rate at which the video signal is sampled.

REFERENCES:
patent: 3816659 (1974-06-01), Landsman
patent: 3898083 (1974-11-01), Townsend
patent: 4068265 (1978-01-01), Russell
patent: 4081842 (1978-03-01), Harbaugh et al.
patent: 4131916 (1978-12-01), Landsman

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