JPS5773565A - Image reader - Google Patents

Image reader

Info

Publication number
JPS5773565A
JPS5773565A JP55148350A JP14835080A JPS5773565A JP S5773565 A JPS5773565 A JP S5773565A JP 55148350 A JP55148350 A JP 55148350A JP 14835080 A JP14835080 A JP 14835080A JP S5773565 A JPS5773565 A JP S5773565A
Authority
JP
Japan
Prior art keywords
value
scanning
outputted
inputted
sub
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
JP55148350A
Other languages
Japanese (ja)
Inventor
Yukihiko Ogata
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 JP55148350A priority Critical patent/JPS5773565A/en
Publication of JPS5773565A publication Critical patent/JPS5773565A/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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To read details of an image on an original surely, by taking the logical product of image information inverting the output of an adjacent element to the sub-scanning and main scanning directions as a discriminated value. CONSTITUTION:An output signal of a solid-state scanning element 20 having n sets of elements toeard the sub-scanning direction is inputted to a binary circuit 21, the 1st threshold value HT and the 2nd threshold value LT are compared, and if the 1st and 2nd binary signals are different, a discrimination request signal is produced from a discrimination signal generating circuit 27. A video data Z is inputted to a discriminating value generation circuit 34 via an inverter 33 and the inversion of the past video data adjacent to the sub-scanning and main scanning directions is outputted to AND gate 36 and the discriminated value (y) is inputted to one input terminal of an AND gate 37 of a selection circuit 28. When the discriminated request signal is outputted, the selection circuit 28 selects the value (y) and an image data Z is outputted.
JP55148350A 1980-10-24 1980-10-24 Image reader Pending JPS5773565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55148350A JPS5773565A (en) 1980-10-24 1980-10-24 Image reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55148350A JPS5773565A (en) 1980-10-24 1980-10-24 Image reader

Publications (1)

Publication Number Publication Date
JPS5773565A true JPS5773565A (en) 1982-05-08

Family

ID=15450791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55148350A Pending JPS5773565A (en) 1980-10-24 1980-10-24 Image reader

Country Status (1)

Country Link
JP (1) JPS5773565A (en)

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