Apparatus and method of converting an image on a transparency to

Details Apparatus and method of converting an image on a transparency to Apparatus and method of converting an image on a transparency to

1979-03-28

1980-11-04

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

350162SF, 354 4, 355 77, G03B 2772

Patent

active

042316561

ABSTRACT:
An apparatus and method of converting an image on a transparency such as photographic film to line art on a recording medium so that the line art may be microfilmed. The invention, through the use of optical processing techniques, greatly simplifies the conversion of continuous tone and half tone photographs to line art which heretofore had to be manually traced prior to microfilming the line art.

REFERENCES:
patent: 3536377 (1970-10-01), Lowenthal
patent: 3719127 (1973-03-01), Mueller
patent: 3821794 (1974-06-01), Yoneyama
patent: 3977771 (1976-08-01), Horner
patent: 4000949 (1977-01-01), Watkins

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