ELECTRONIC REPRODUCTION OF CONTINUOUS IMAGE WITH CONTROLLED MODIFICATION OF IMAGE REPRODUCTION

摘要

A tonal subject and a bar pattern are synchronously scanned to produce image and dot interval signals later combined to form a dot signal modulating by a light valve the width of a light beam synchronously scanning photosensitive film to expose a halftone image of the subject. Tone edges on the subject cause a shifting of the beam center transverse of the scanning direction to sharpen such edges as reproduced. Type matter and picture matter may be respectively reproduced in full tone and half tone by appropriate manual or mask control of the scaling factor of the image signal.