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JPS57160267A - Picture processor - Google Patents

Picture processor

Info

Publication number
JPS57160267A
JPS57160267A JP56045593A JP4559381A JPS57160267A JP S57160267 A JPS57160267 A JP S57160267A JP 56045593 A JP56045593 A JP 56045593A JP 4559381 A JP4559381 A JP 4559381A JP S57160267 A JPS57160267 A JP S57160267A
Authority
JP
Japan
Prior art keywords
matrix
comparison
picture
gradation
concentration value
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.)
Granted
Application number
JP56045593A
Other languages
Japanese (ja)
Other versions
JPH0620232B2 (en
Inventor
Naoto Kawamura
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 JP56045593A priority Critical patent/JPH0620232B2/en
Publication of JPS57160267A publication Critical patent/JPS57160267A/en
Publication of JPH0620232B2 publication Critical patent/JPH0620232B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Character Input (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To realize the stable high image resolution and high gradation for a picture processor that compares process with a comparison matrix, by giving a minute shift to the comparison matrix for each picture element to increase the gradation properties. CONSTITUTION:The picture information showing a picture element is delivered based on th result of comparison of a binary form corresponding to each matrix element. A video signal 73 given from a camera 71 is converted into a digital signal 77 and then compared with the concentration value of the matrix element stored in the comparison matrix in a memory 79 through a comparator 81. Based on the result of this comparison, the concentration value of each matrix element in the comparison matrix is shifted by a certain minute extent for each picture element of the input picture information. Thus the gradation properties is increased.
JP56045593A 1981-03-30 1981-03-30 Image processing device Expired - Lifetime JPH0620232B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56045593A JPH0620232B2 (en) 1981-03-30 1981-03-30 Image processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56045593A JPH0620232B2 (en) 1981-03-30 1981-03-30 Image processing device

Publications (2)

Publication Number Publication Date
JPS57160267A true JPS57160267A (en) 1982-10-02
JPH0620232B2 JPH0620232B2 (en) 1994-03-16

Family

ID=12723642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56045593A Expired - Lifetime JPH0620232B2 (en) 1981-03-30 1981-03-30 Image processing device

Country Status (1)

Country Link
JP (1) JPH0620232B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149557A (en) * 1983-02-16 1984-08-27 T H S:Kk Processing system of x-ray film
JPS62245865A (en) * 1986-04-18 1987-10-27 Shinko Electric Co Ltd Digitizing multivalued signal input device
JPH03118594A (en) * 1989-09-30 1991-05-21 Meitaku Syst:Kk Surface light source panel
JPH04306502A (en) * 1991-03-27 1992-10-29 Meitaku Syst:Kk Light introducing pattern for edge light panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245258A (en) * 1979-11-05 1981-01-13 Xerox Corporation Method and apparatus for reduction of false contours in electrically screened images
JPS57119562A (en) * 1981-01-19 1982-07-26 Ricoh Co Ltd Binary-coded gradation processing method for analog picture signal
JPS57138268A (en) * 1981-02-20 1982-08-26 Ricoh Co Ltd Image signal processing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245258A (en) * 1979-11-05 1981-01-13 Xerox Corporation Method and apparatus for reduction of false contours in electrically screened images
JPS57119562A (en) * 1981-01-19 1982-07-26 Ricoh Co Ltd Binary-coded gradation processing method for analog picture signal
JPS57138268A (en) * 1981-02-20 1982-08-26 Ricoh Co Ltd Image signal processing system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149557A (en) * 1983-02-16 1984-08-27 T H S:Kk Processing system of x-ray film
JPS62245865A (en) * 1986-04-18 1987-10-27 Shinko Electric Co Ltd Digitizing multivalued signal input device
JPH03118594A (en) * 1989-09-30 1991-05-21 Meitaku Syst:Kk Surface light source panel
JPH04306502A (en) * 1991-03-27 1992-10-29 Meitaku Syst:Kk Light introducing pattern for edge light panel

Also Published As

Publication number Publication date
JPH0620232B2 (en) 1994-03-16

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