JPH0550187B2 - - Google Patents

Info

Publication number
JPH0550187B2
JPH0550187B2 JP58244164A JP24416483A JPH0550187B2 JP H0550187 B2 JPH0550187 B2 JP H0550187B2 JP 58244164 A JP58244164 A JP 58244164A JP 24416483 A JP24416483 A JP 24416483A JP H0550187 B2 JPH0550187 B2 JP H0550187B2
Authority
JP
Japan
Prior art keywords
image
block
density
density difference
data
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
JP58244164A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60136478A (ja
Inventor
Hiroshi Tanioka
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 JP58244164A priority Critical patent/JPS60136478A/ja
Priority to GB08432299A priority patent/GB2153619B/en
Priority to DE19843446880 priority patent/DE3446880A1/de
Publication of JPS60136478A publication Critical patent/JPS60136478A/ja
Priority to US07/437,310 priority patent/US5018024A/en
Publication of JPH0550187B2 publication Critical patent/JPH0550187B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Facsimile Image Signal Circuits (AREA)
JP58244164A 1983-12-26 1983-12-26 画調識別方法 Granted JPS60136478A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP58244164A JPS60136478A (ja) 1983-12-26 1983-12-26 画調識別方法
GB08432299A GB2153619B (en) 1983-12-26 1984-12-20 Image processing apparatus
DE19843446880 DE3446880A1 (de) 1983-12-26 1984-12-21 Bildverarbeitungseinrichtung
US07/437,310 US5018024A (en) 1983-12-26 1989-11-17 Image processing apparatus using two-dimensional space frequency to discriminate image type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58244164A JPS60136478A (ja) 1983-12-26 1983-12-26 画調識別方法

Publications (2)

Publication Number Publication Date
JPS60136478A JPS60136478A (ja) 1985-07-19
JPH0550187B2 true JPH0550187B2 (ko) 1993-07-28

Family

ID=17114717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58244164A Granted JPS60136478A (ja) 1983-12-26 1983-12-26 画調識別方法

Country Status (1)

Country Link
JP (1) JPS60136478A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7262884B2 (en) 2002-11-22 2007-08-28 Kabushiki Kaisha Toshiba Image processing apparatus and image processing method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6371782A (ja) * 1986-09-12 1988-04-01 Sharp Corp 画像信号２値化装置
JP2677989B2 (ja) * 1986-11-17 1997-11-17 松下電送 株式会社 擬似中間調処理装置
JP4961069B2 (ja) * 2000-03-06 2012-06-27 ソニー株式会社 オーディオシステム及び電子機器
JP5842441B2 (ja) * 2011-07-29 2016-01-13 ブラザー工業株式会社 画像処理装置およびプログラム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176481A (en) * 1981-04-22 1982-10-29 Ricoh Co Ltd Discriminating method for medium contrast picture
JPS57185446A (en) * 1981-05-12 1982-11-15 Canon Inc Forming method of color picture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176481A (en) * 1981-04-22 1982-10-29 Ricoh Co Ltd Discriminating method for medium contrast picture
JPS57185446A (en) * 1981-05-12 1982-11-15 Canon Inc Forming method of color picture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7262884B2 (en) 2002-11-22 2007-08-28 Kabushiki Kaisha Toshiba Image processing apparatus and image processing method

Also Published As

Publication number Publication date
JPS60136478A (ja) 1985-07-19

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