Image signal processing with a variable threshold

Details Image signal processing with a variable threshold Image signal processing with a variable threshold

1981-08-28

1985-09-03

Sloyan, T. J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

382 53, 382 50, 340347CC, 340347M, G06K 900, H04N 140

Patent

active

045396000

ABSTRACT:
An image signal processing apparatus particularly suitable for use in a facsimile system for converting an analog image signal obtained by photoelectrically reading an original into a binary image signal for further processing is provided. The present image signal processing apparatus comprises a digital-to-analog converter and a digital data input unit, preferably a microcomputer, connected to the converter. Thus, the level of the reference voltage to be supplied to the comparator for converting the analog image signal into the binary image signal may be finely adjusted appropriately without complication in structure.

REFERENCES:
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-32 to I-35; I-52 to I-63; II-32 to II-39; and III-73 to III-81.

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