JPS56115079A - Edge extracting method of picture - Google Patents

Edge extracting method of picture

Info

Publication number
JPS56115079A
JPS56115079A JP1873280A JP1873280A JPS56115079A JP S56115079 A JPS56115079 A JP S56115079A JP 1873280 A JP1873280 A JP 1873280A JP 1873280 A JP1873280 A JP 1873280A JP S56115079 A JPS56115079 A JP S56115079A
Authority
JP
Japan
Prior art keywords
picture element
concentration level
picture
level
arithmetic circuit
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
JP1873280A
Other languages
Japanese (ja)
Inventor
Morizumi Kurose
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1873280A priority Critical patent/JPS56115079A/en
Publication of JPS56115079A publication Critical patent/JPS56115079A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/20—Contour coding, e.g. using detection of edges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Multimedia (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Analysis (AREA)

Abstract

PURPOSE:To extract the optimum edge part according to the state of a picture, by multiplying the absolute value of the difference between the concentration level of the noticed picture element and the concentration level of the adjacent picture element by the concentration level of the noticed picture element and then giving a comparison and decision between the result of the said multiplication and the threshold level set previously. CONSTITUTION:The picture information given from a scanner and every picture element is stored collectively at the input buffer part consisting of the 1-bit shift register 1 plus 1-line shift registers 2 and 3. The concentration level signals QX, QB and QG of the noticed picture element X and its peripheral picture elements B and G each are extracted in parallel out of the registers 1-3 and then combined properly to obtain the absolute value of the concentration level difference between the signal QX and the signals QB and QG through the 1st arithmetic circuit 4, 2nd arithmetic circuit 5 and 3rd arithmetic circuit 6 each. Then the level difference is multiplied by the concentration level of the picture element X. The result of this operation is applied to the level detector 7 to be compared with the threshold level set previously. Thus the optimum edge part can be extracted.
JP1873280A 1980-02-18 1980-02-18 Edge extracting method of picture Pending JPS56115079A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1873280A JPS56115079A (en) 1980-02-18 1980-02-18 Edge extracting method of picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1873280A JPS56115079A (en) 1980-02-18 1980-02-18 Edge extracting method of picture

Publications (1)

Publication Number Publication Date
JPS56115079A true JPS56115079A (en) 1981-09-10

Family

ID=11979836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1873280A Pending JPS56115079A (en) 1980-02-18 1980-02-18 Edge extracting method of picture

Country Status (1)

Country Link
JP (1) JPS56115079A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894271A (en) * 1981-11-30 1983-06-04 Matsushita Graphic Commun Syst Inc Contour extracting method of binary picture
JPS6232573A (en) * 1985-07-25 1987-02-12 ゼネラル・エレクトリック・カンパニイ Method and apparatus for reducing image data
US5104216A (en) * 1988-12-05 1992-04-14 Igm Industriegerate- Und Maschinenfabriksgesellschaft Mbh Process for determining the position and the geometry of workpiece surfaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894271A (en) * 1981-11-30 1983-06-04 Matsushita Graphic Commun Syst Inc Contour extracting method of binary picture
JPS6232573A (en) * 1985-07-25 1987-02-12 ゼネラル・エレクトリック・カンパニイ Method and apparatus for reducing image data
US5104216A (en) * 1988-12-05 1992-04-14 Igm Industriegerate- Und Maschinenfabriksgesellschaft Mbh Process for determining the position and the geometry of workpiece surfaces

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