JPS5957572A - ２値化方式 - Google Patents

２値化方式

Info

Publication number
JPS5957572A
JPS5957572A JP57166605A JP16660582A JPS5957572A JP S5957572 A JPS5957572 A JP S5957572A JP 57166605 A JP57166605 A JP 57166605A JP 16660582 A JP16660582 A JP 16660582A JP S5957572 A JPS5957572 A JP S5957572A
Authority
JP
Japan
Prior art keywords
signal
circuit
peak value
minimum value
threshold voltage
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
JP57166605A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0436503B2 (en:Method
Inventor
Isao Sagara
相良　功
Yasuo Inoue
井上　保男
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57166605A priority Critical patent/JPS5957572A/ja
Publication of JPS5957572A publication Critical patent/JPS5957572A/ja
Publication of JPH0436503B2 publication Critical patent/JPH0436503B2/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)
  • Facsimile Image Signal Circuits (AREA)
JP57166605A 1982-09-27 1982-09-27 ２値化方式 Granted JPS5957572A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57166605A JPS5957572A (ja) 1982-09-27 1982-09-27 ２値化方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57166605A JPS5957572A (ja) 1982-09-27 1982-09-27 ２値化方式

Publications (2)

Publication Number Publication Date
JPS5957572A true JPS5957572A (ja) 1984-04-03
JPH0436503B2 JPH0436503B2 (en:Method) 1992-06-16

Family

ID=15834392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57166605A Granted JPS5957572A (ja) 1982-09-27 1982-09-27 ２値化方式

Country Status (1)

Country Link
JP (1) JPS5957572A (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61242170A (ja) * 1985-04-19 1986-10-28 Hitachi Chiyou Lsi Eng Kk 信号処理装置
US5296940A (en) * 1990-04-18 1994-03-22 Toyo Boseki Kabushiki Kaisha Image processing method and apparatus for converting gray-scale images into binary images

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156475A (en) * 1979-05-25 1980-12-05 Hitachi Ltd Binary-coder for analog signal
JPS566523A (en) * 1979-06-29 1981-01-23 Hitachi Ltd Video binary coding system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156475A (en) * 1979-05-25 1980-12-05 Hitachi Ltd Binary-coder for analog signal
JPS566523A (en) * 1979-06-29 1981-01-23 Hitachi Ltd Video binary coding system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61242170A (ja) * 1985-04-19 1986-10-28 Hitachi Chiyou Lsi Eng Kk 信号処理装置
US5296940A (en) * 1990-04-18 1994-03-22 Toyo Boseki Kabushiki Kaisha Image processing method and apparatus for converting gray-scale images into binary images

Also Published As

Publication number Publication date
JPH0436503B2 (en:Method) 1992-06-16

Similar Documents

Publication Publication Date Title
JPS5957572A (ja) ２値化方式
JPS6093878A (ja) 画像読取装置
JP2504037B2 (ja) フアクシミリ装置
JPH04271667A (ja) 色彩情報の読み取り方式
JPS6339141B2 (en:Method)
JP2675079B2 (ja) ２値化処理回路
JPH02218270A (ja) 画像読取り装置における２値化処理方式
JPH057913B2 (en:Method)
JPH0417586B2 (en:Method)
JPS6019708B2 (ja) 画信号２値化回路
JP2973475B2 (ja) 原稿読取装置の原稿先端検出方式
JPS5929421Y2 (ja) 画像情報読取装置
JPS61177069A (ja) スキヤナ−装置
JPS6247027B2 (en:Method)
JPH0523540B2 (en:Method)
JPH01177278A (ja) 画像読取装置
JPS6139174A (ja) シエ−デイング補正方式
JPH03289763A (ja) 原稿読取装置
JPS6126744B2 (en:Method)
JPH0253375A (ja) 読取部汚れ検出回路
JPH04196762A (ja) 画信号２値化装置
JPH04288774A (ja) 画像データの読込処理方法
JPS58142674A (ja) フアクシミリ用デ−タ処理装置
JPH01191844A (ja) 複写機
JPH05347697A (ja) 画像読取装置