JPS57206170A - Image processor - Google Patents

Image processor

Info

Publication number
JPS57206170A
JPS57206170A JP56091295A JP9129581A JPS57206170A JP S57206170 A JPS57206170 A JP S57206170A JP 56091295 A JP56091295 A JP 56091295A JP 9129581 A JP9129581 A JP 9129581A JP S57206170 A JPS57206170 A JP S57206170A
Authority
JP
Japan
Prior art keywords
signal
rom5
threshold
delivers
oscillator
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
JP56091295A
Other languages
Japanese (ja)
Inventor
Masahiko Matsunawa
Yoshinori Abe
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56091295A priority Critical patent/JPS57206170A/en
Publication of JPS57206170A publication Critical patent/JPS57206170A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To eliminate the background information of an original in an extremely simple way with no control of the hardware, by setting the lower limit value to the threshold level for the binary coding. CONSTITUTION:A CCD control circuit 3 receives the output signal of an oscillator 1 and delivers an image signal Se to a CCd module 2. On the other hand, a counter 4 receives the output of the oscillator 1 and delivers the threshold levels successively from an ROM5. The threshold value given from the ROM5 is converted into an analog signal Sd through a D/A converter 6 and fed to a comparator 7 along with the signal Se. At the same time, the threshold levels forming a dither matrix are written successively into the ROM5 in correspondence to the addresses. The threshold value exists only in a range of 0.3-1, for example. In other words, a lower limit level 0.3 is set. As a result, a high-contrast image containing no background signal is recorded at a recording part 8.
JP56091295A 1981-06-13 1981-06-13 Image processor Pending JPS57206170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56091295A JPS57206170A (en) 1981-06-13 1981-06-13 Image processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56091295A JPS57206170A (en) 1981-06-13 1981-06-13 Image processor

Publications (1)

Publication Number Publication Date
JPS57206170A true JPS57206170A (en) 1982-12-17

Family

ID=14022473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56091295A Pending JPS57206170A (en) 1981-06-13 1981-06-13 Image processor

Country Status (1)

Country Link
JP (1) JPS57206170A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723174A (en) * 1985-04-09 1988-02-02 Fuji Xerox Co., Ltd. Picture image processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723174A (en) * 1985-04-09 1988-02-02 Fuji Xerox Co., Ltd. Picture image processor

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