Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-12-21
1989-09-19
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358400, H04N 140
Patent
active
048686719
ABSTRACT:
A multi-gradation image signal obtained by multi-gradationization of a signal obtained by reading through a CCD an original having a half tone is supplied to an unsharp signal producing part, which in turn outputs an unsharp signal produced from the multi-gradation image signal and the multi-gradation image signal itself. A comparator discriminates a shadow portion of the original by comparing the multi-gradation image signal with a reference value. As a result, a signal which is unsharp in the shadow portion of the original is produced from the multi-gradation image signal and the unsharp signal.
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Dainippon Screen Mfg. Co,. Ltd.
Groody James J.
Svihla Randall S.
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