JPH0468824B2 - - Google Patents

Info

Publication number
JPH0468824B2
JPH0468824B2 JP57043085A JP4308582A JPH0468824B2 JP H0468824 B2 JPH0468824 B2 JP H0468824B2 JP 57043085 A JP57043085 A JP 57043085A JP 4308582 A JP4308582 A JP 4308582A JP H0468824 B2 JPH0468824 B2 JP H0468824B2
Authority
JP
Japan
Prior art keywords
level
ridge
valley
point
points
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.)
Expired - Lifetime
Application number
JP57043085A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58161470A (ja
Inventor
Toshuki Sakai
Yoshihiro Okada
Masatoshi Hino
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP57043085A priority Critical patent/JPS58161470A/ja
Priority to US06/476,218 priority patent/US4575768A/en
Publication of JPS58161470A publication Critical patent/JPS58161470A/ja
Publication of JPH0468824B2 publication Critical patent/JPH0468824B2/ja
Granted 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)
  • Character Input (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP57043085A 1982-03-18 1982-03-18 映像信号２値化方式 Granted JPS58161470A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP57043085A JPS58161470A (ja) 1982-03-18 1982-03-18 映像信号２値化方式
US06/476,218 US4575768A (en) 1982-03-18 1983-03-17 Conversion to a two-valued video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57043085A JPS58161470A (ja) 1982-03-18 1982-03-18 映像信号２値化方式

Publications (2)

Publication Number Publication Date
JPS58161470A JPS58161470A (ja) 1983-09-26
JPH0468824B2 true JPH0468824B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-11-04

Family

ID=12653994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57043085A Granted JPS58161470A (ja) 1982-03-18 1982-03-18 映像信号２値化方式

Country Status (1)

Country Link
JP (1) JPS58161470A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132567A (ja) * 1988-11-14 1990-05-22 Fuji Electric Co Ltd ２値化回路
US6266445B1 (en) * 1998-03-13 2001-07-24 Canon Kabushiki Kaisha Classification-driven thresholding of a normalized grayscale image

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299720A (en) * 1976-02-18 1977-08-22 Toshiba Corp Method of converting analogous image signal to binary value

Also Published As

Publication number Publication date
JPS58161470A (ja) 1983-09-26

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