Image scanning and recording method

Details Image scanning and recording method Image scanning and recording method

1982-05-18

1984-05-22

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358302, H04N 140

Patent

active

044504853

ABSTRACT:
An image scanning and recording method wherein a random pulse signal is added either to the image signal obtained by scanning a continuous tone original or to the dot signal controlled synchronously with the scanning of the original. The image signal and the dot signal are compared with each other to obtain a randomized dot image signal. A light beam is on-off modulated by a light modulator in accordance with the randomized dot image signal, and a photosensitive recording medium is scanned with the on-off modulated light beam so as to record thereon a dot image corresponding to the continuous tone original. The random pulse signal is added to a peak portion and/or a middle level portion of the dot signal. Alternatively, the random pulse signal is added contiguously either to the whole dot signal or to the whole image signal.

REFERENCES:
patent: 3916096 (1975-10-01), Everett
patent: 4032978 (1977-06-01), Wong
patent: 4033443 (1977-07-01), Bunge
patent: 4340912 (1982-07-01), Troxel

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