Image signal processing apparatus

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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358465, 358466, H04N 140

Patent

active

052786722

ABSTRACT:
An image signal processing apparatus converting an image signal representing a continuous tone image into an image signal indicating a halftone dot image. The continuous tone image signal is compared with a threshold signal. If the difference between the continuous tone image signal and the threshold signal falls within a predetermined range, then the halftone dot image signal is produced based on a probabilistically established signal. The halftone dot image thus produced is smooth without an appreciable tone jump.

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English translation of Harada et al, "Randon Number Generation by Use of M-Sequence" presented at the 25th Annual Meeting of . . . ), Collected Papers at the Annual Meeting of the Society for Measurement and Automatic Control, vol. 23, No. 8 (Aug. 1987).
Lewis et al "Generalized Feedback Shift Register Pseudorandom Number Algorithm", Journal of the Association of Computing Machinery, vol. 20, No. 3, Jul. 1973, pp. 456-468.

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