Image processing apparatus

Details Image processing apparatus Image processing apparatus

1989-11-29

1991-08-20

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358404, H04N 140

Patent

active

050419196

ABSTRACT:
An image processing apparatus wherein a document on a document support table and an optical system are moved relative to each other for scanning to read the image of the document as a density signal, and the read signal is processed as required, the apparatus comprising a document mat so colored that when the document support table is covered with the mat, the read signal represents an intermediate color, discriminating device for judging whether the density signal represents the intermediate color to produce a binary signal, a memory having a memory capacity of l
based on the density signal, a write control for causing the binary signal to be written in the memory device in synchronism with the scanning movement, and apparatus for determining the size of the document from the contents of the memory device.

REFERENCES:
patent: 4772955 (1988-09-01), Kuranayashi et al.
patent: 4899227 (1990-02-01), Yamada

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