JPS57145474A - Image input device - Google Patents

Image input device

Info

Publication number
JPS57145474A
JPS57145474A JP56030453A JP3045381A JPS57145474A JP S57145474 A JPS57145474 A JP S57145474A JP 56030453 A JP56030453 A JP 56030453A JP 3045381 A JP3045381 A JP 3045381A JP S57145474 A JPS57145474 A JP S57145474A
Authority
JP
Japan
Prior art keywords
signal
original
continuous gradation
conversion
pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56030453A
Other languages
Japanese (ja)
Inventor
Susumu Sugiura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP56030453A priority Critical patent/JPS57145474A/en
Publication of JPS57145474A publication Critical patent/JPS57145474A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone

Abstract

PURPOSE:To realize the conversion of a dot, by transmitting the electric signal that read an original itself to a recording system or transmitting the converted electric signal to the recording system or switching it after discriminatong a continuous gradation or not. CONSTITUTION:In case an image on an original 5 has a continuous gradation having the same concentratiin in a comparatively large range, a time series signal 25 obtained a screen 15 and a photoelectric element 17 after the photoelectric conversion has a certain pattern according to the concentration. Then a converted series signal pattern formed on a concentric circle is previously stored in a memory within a discriminating circuit 101 for a comparison. When a coincidence is obtained between both patterns, the original at the reading part is decided as a continuous gradation pattern. In case no coincidence is obtained, a discrimination signal 105 is produced to switch a video signal changeover switch 41 to the side of a contact (b). Then a print pattern signal 79 is produced based on the information having a dot conversion and stored in a memory 65.
JP56030453A 1981-03-05 1981-03-05 Image input device Pending JPS57145474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56030453A JPS57145474A (en) 1981-03-05 1981-03-05 Image input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56030453A JPS57145474A (en) 1981-03-05 1981-03-05 Image input device

Publications (1)

Publication Number Publication Date
JPS57145474A true JPS57145474A (en) 1982-09-08

Family

ID=12304322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56030453A Pending JPS57145474A (en) 1981-03-05 1981-03-05 Image input device

Country Status (1)

Country Link
JP (1) JPS57145474A (en)

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