DE2634332C3 - - Google Patents

Info

Publication number: DE2634332C3
Authority: DE; Germany
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

Application number

DE2634332A

Other versions

DE2634332B2 (de

DE2634332A1 (de

Inventor

Michihiro Mese

Takafumi Miyatake

Seiji Kokubunji Kashioka

Toshomitsu Tokio Hamada

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.)

1975-08-01

Filing date

1976-07-30

Publication date

1981-01-22

1976-07-30 Application filed by Hitachi Ltd filed Critical Hitachi Ltd

1977-02-03 Publication of DE2634332A1 publication Critical patent/DE2634332A1/de

1980-05-14 Publication of DE2634332B2 publication Critical patent/DE2634332B2/de

1981-01-22 Application granted granted Critical

1981-01-22 Publication of DE2634332C3 publication Critical patent/DE2634332C3/de

Status Granted legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0007—Image acquisition
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
- 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

DE2634332A 1975-08-01 1976-07-30 Analog/Digital-Umsetzer in Verbindung mit einem Bildaufnahmegerät Granted DE2634332B2 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP50093095A JPS5218132A (en)	1975-08-01	1975-08-01	Binary circuit

Publications (3)

Publication Number	Publication Date
DE2634332A1 DE2634332A1 (de)	1977-02-03
DE2634332B2 DE2634332B2 (de)	1980-05-14
DE2634332C3 true DE2634332C3 (de)	1981-01-22

Family

ID=14072952

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE2634332A Granted DE2634332B2 (de)	1975-08-01	1976-07-30	Analog/Digital-Umsetzer in Verbindung mit einem Bildaufnahmegerät

Country Status (5)

Country	Link
US (1)	US4064484A (de)
JP (1)	JPS5218132A (de)
DE (1)	DE2634332B2 (de)
GB (1)	GB1560404A (de)
NL (1)	NL7608396A (de)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4119947A (en) *	1977-07-20	1978-10-10	Howard Noyes Leighton	Optical signal processor
US4157533A (en) *	1977-11-25	1979-06-05	Recognition Equipment Incorporated	Independent channel automatic gain control for self-scanning photocell array
JPS5474623A (en) *	1977-11-28	1979-06-14	Nippon Telegr & Teleph Corp <Ntt>	Coding processing system for video signal
US4205341A (en) *	1978-01-24	1980-05-27	Nippon Telegraph And Telephone Public Corporation	Picture signal coding apparatus
US4153895A (en) *	1978-08-01	1979-05-08	Recognition Equipment Incorporated	Mark sense reader
JPS5583372A (en) *	1978-12-20	1980-06-23	Toshiba Corp	Character read system
FR2466153A1 (fr) *	1979-09-21	1981-03-27	Thomson Csf	Dispositif de decision noir ou blanc a seuil autoadaptatif pour systeme d'analyse de document et emetteur de telecopie comportant un tel dispositif
FR2490901A1 (fr) *	1980-09-19	1982-03-26	Trt Telecom Radio Electr	Annuleur d'echo numerique muni d'un convertisseur analogique-numerique a dynamique reglable
JPS57131171A (en) *	1981-02-05	1982-08-13	Matsushita Graphic Commun Syst Inc	Amplitude compensation device of picture signal
JPS57157378A (en) *	1981-03-25	1982-09-28	Hitachi Ltd	Setting method of binary-coded threshold level
US4442544A (en) *	1981-07-09	1984-04-10	Xerox Corporation	Adaptive thresholder
US4395732A (en) *	1981-08-19	1983-07-26	Motorola Inc.	Statistically adaptive analog to digital converter
NL8105256A (nl) *	1981-11-20	1983-06-16	Philips Nv	Inrichting voor het dynamisch instellen van een discriminatiedrempel zwart/wit bij het bewerken van beelden met grijsheidswaarden.
AU565874B2 (en) *	1983-03-11	1987-10-01	Ei Solutions, Inc.	Adaptive threshold circuit for digital image processing
DE3413651C3 (de) *	1983-04-12	1997-11-20	Canon Kk	Bildsignalverarbeitungsgerät
US4674126A (en) *	1983-09-12	1987-06-16	Canon Kabushiki Kaisha	Image signal processing apparatus
JPH0632072B2 (ja) *	1984-02-09	1994-04-27	日本電気株式会社	多値パタ−ン信号のスライス回路
JPS60247379A (ja) *	1984-05-22	1985-12-07	Casio Comput Co Ltd	映像信号ａ／ｄ変換回路
US4642694A (en) *	1984-05-22	1987-02-10	Casio Computer Co., Ltd.	Television video signal A/D converter
JPS60254279A (ja) *	1984-05-31	1985-12-14	Fuji Electric Co Ltd	２値化しきい値の決定方法
JPS6297079A (ja) *	1985-10-24	1987-05-06	Hitachi Ltd	ビデオ信号の２値化回路
US4916744A (en) *	1985-12-10	1990-04-10	Fuji Photo Film Co., Ltd.	Image signal processing method
US4829380A (en) *	1987-12-09	1989-05-09	General Motors Corporation	Video processor
IT1219119B (it) *	1988-03-18	1990-05-03	Olivetti & Co Spa	Circuito di regolazione automatica della soglia di un segnale di lettura per un dispositivo di scansione digitale di immagini
JPH02168296A (ja) *	1988-12-22	1990-06-28	Mitsubishi Electric Corp	液晶表示装置
EP0529903B1 (de) *	1991-08-23	2000-01-12	Mitsubishi Denki Kabushiki Kaisha	Pixelinterpolationsschaltkreis und Anwendungen
US5337373A (en) *	1991-10-24	1994-08-09	International Business Machines Corporation	Automatic threshold generation technique
EP0603593B1 (de) *	1992-12-23	1998-01-21	Eastman Kodak Company	Automatischer Abgleich der Kanalverstärkung und -abweichung für Videokameras mit Multikanalsensoren
JPH0787312A (ja) *	1993-09-13	1995-03-31	Canon Inc	画像読取装置
US5995676A (en) *	1996-12-26	1999-11-30	Lucent Technologies Inc.	Comparator-based thresholding method for determining data values
FR2923102B1 (fr) *	2007-10-30	2010-11-12	Valeo Systemes Thermiques	Procede de numerisation d'un signal quelconque
WO2017163485A1 (ja) *	2016-03-25	2017-09-28	富士フイルム株式会社	アナログ／ディジタル変換装置およびその制御方法
CN107185221B (zh) *	2017-07-03	2018-12-14	哈尔滨体育学院	一种用于冰雪体育运动的场地监测管理装置与方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3484747A (en) *	1965-06-07	1969-12-16	Recognition Equipment Inc	Digital-analog retina output conditioning
US3701099A (en) *	1971-06-08	1972-10-24	Ibm	Dynamic discrimination reference level generator for a parallel channel optical document scanner
US3747066A (en) *	1971-08-23	1973-07-17	Ocr Syst Inc	Optical scanner and signal processing system
US3778768A (en) *	1971-08-27	1973-12-11	Little Inc A	Character detection system
US3737854A (en) *	1971-09-08	1973-06-05	A Klemt	Method of classifying characters wherein the effects of variations in contrast between a presented character and its background and variations in background brightness are reduced, and the apparatus therefor
US3737855A (en) *	1971-09-30	1973-06-05	Ibm	Character video enhancement system
US3911212A (en) *	1974-07-30	1975-10-07	Toyo Ink Mfg Co	Threshold device for converting video signal to binary video signals and method of determining threshold level

1975
- 1975-08-01 JP JP50093095A patent/JPS5218132A/ja active Granted
1976
- 1976-07-23 GB GB30916/76A patent/GB1560404A/en not_active Expired
- 1976-07-26 US US05/708,633 patent/US4064484A/en not_active Expired - Lifetime
- 1976-07-28 NL NL7608396A patent/NL7608396A/xx unknown
- 1976-07-30 DE DE2634332A patent/DE2634332B2/de active Granted

Also Published As

Publication number	Publication date
US4064484A (en)	1977-12-20
DE2634332B2 (de)	1980-05-14
GB1560404A (en)	1980-02-06
NL7608396A (nl)	1977-02-03
JPS5711071B2 (de)	1982-03-02
JPS5218132A (en)	1977-02-10
DE2634332A1 (de)	1977-02-03

Legal Events

Date	Code	Title	Description
1981-01-22	C3	Grant after two publication steps (3rd publication)
1983-03-10	8328	Change in the person/name/address of the agent	Free format text: STREHL, P., DIPL.-ING. DIPL.-WIRTSCH.-ING. SCHUEBEL-HOPF, U., DIPL.-CHEM. DR.RER.NAT., PAT.-ANW., 8000 MUENCHEN

Publication	Publication Date	Title
DE2634332C3 (de)	1981-01-22
JPS5347314Y2 (de)	1978-11-13
JPS5238160U (de)	1977-03-17
JPS5248469B2 (de)	1977-12-09
JPS5246327U (de)	1977-04-01
JPS5222300U (de)	1977-02-17
JPS5540170Y2 (de)	1980-09-19
JPS5290713U (de)	1977-07-06
JPS5286057U (de)	1977-06-27
JPS51147971U (de)	1976-11-27
CH600627A5 (de)	1978-06-30
CH596830A5 (de)	1978-03-31
CH597004A5 (de)	1978-03-31
CH604313A5 (de)	1978-09-15
CH603989A5 (de)	1978-08-31
CH603843A5 (de)	1978-08-31
CH603420A5 (de)	1978-08-15
CH603120A5 (de)	1978-08-15
CH603008A5 (de)	1978-08-15
CH602996A5 (de)	1978-08-15
CH602363A5 (de)	1978-07-31
CH602111A5 (de)	1978-07-31
CH602062A5 (de)	1978-07-31
CH604455A5 (de)	1978-09-15
CH600516A5 (de)	1978-06-15