DE3135156A1 - Bildsignalverarbeitungsgeraet - Google Patents

Bildsignalverarbeitungsgeraet

Info

Publication number
DE3135156A1
DE3135156A1 DE19813135156 DE3135156A DE3135156A1 DE 3135156 A1 DE3135156 A1 DE 3135156A1 DE 19813135156 DE19813135156 DE 19813135156 DE 3135156 A DE3135156 A DE 3135156A DE 3135156 A1 DE3135156 A1 DE 3135156A1
Authority
DE
Germany
Prior art keywords
image signal
digital
analog
analog converter
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.)
Ceased
Application number
DE19813135156
Other languages
German (de)
English (en)
Inventor
Mitsuru Sagamihara Kanagawa Kondo
Shuichi Higashiohnuma Kanagawa Takahasi
Kazuhiro Zama Kanagawa Yuasa
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
Publication of DE3135156A1 publication Critical patent/DE3135156A1/de
Ceased 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)
  • Manipulation Of Pulses (AREA)
DE19813135156 1980-09-04 1981-09-04 Bildsignalverarbeitungsgeraet Ceased DE3135156A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55122853A JPS5746573A (en) 1980-09-04 1980-09-04 Picture signal processing device

Publications (1)

Publication Number Publication Date
DE3135156A1 true DE3135156A1 (de) 1982-04-08

Family

ID=14846253

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813135156 Ceased DE3135156A1 (de) 1980-09-04 1981-09-04 Bildsignalverarbeitungsgeraet

Country Status (3)

Country Link
US (1) US4539600A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5746573A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3135156A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181320A3 (de) * 1984-11-08 1988-06-22 MUPID COMPUTER GESELLSCHAFT m.b.H. Anordnung zur Speicherung einer Bildvorlage in einem Digitalspeicher

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309080A1 (de) * 1983-03-14 1984-09-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum umwandeln eines analogen bildsignals in ein amplitudendiskretes ausgangssignal
US4674126A (en) * 1983-09-12 1987-06-16 Canon Kabushiki Kaisha Image signal processing apparatus
JPS6184967A (ja) * 1984-10-03 1986-04-30 Oki Electric Ind Co Ltd スライスレベル決定回路
US4723174A (en) * 1985-04-09 1988-02-02 Fuji Xerox Co., Ltd. Picture image processor
JPS6354059A (ja) * 1986-08-25 1988-03-08 Oki Electric Ind Co Ltd 画像信号処理回路
US4755813A (en) * 1987-06-15 1988-07-05 Xerox Corporation Screening circuit for screening image pixels
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US4868670A (en) * 1987-07-24 1989-09-19 Eastman Kodak Company Apparatus and method for improving the compressibility of an enhanced image through use of a momentarily varying threshold level
US5119211A (en) * 1988-04-26 1992-06-02 Ricoh Company, Ltd. Image reader for an image forming apparatus
US5172244A (en) * 1988-09-12 1992-12-15 Ricoh Company, Ltd. Digital copier
US5051839A (en) * 1988-09-12 1991-09-24 Ricoh Company, Ltd. Digital copier
JP2918041B2 (ja) * 1989-03-14 1999-07-12 株式会社リコー 画像読取り装置
JP2825622B2 (ja) * 1990-07-20 1998-11-18 国際電気 株式会社 ビデオプリンタアダプタ
US5377282A (en) * 1991-09-19 1994-12-27 International Business Machines Corporation Optical inspection system utilizing dynamic analog-to-digital thresholding
US5396280A (en) * 1993-02-26 1995-03-07 International Business Machines, Corporation Analog video processing apparatus and method for eliminating background levels in the analog signal
RU2155987C1 (ru) * 1999-04-07 2000-09-10 Бурмасов Сергей Павлович Устройство для классификации сигналов

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917485A1 (de) * 1978-05-02 1979-11-08 Ricoh Kk Digital-kopiergeraet
DE3014670A1 (de) * 1979-04-16 1980-10-23 Ricoh Kk Faksimile-sende-empfaenger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917485A1 (de) * 1978-05-02 1979-11-08 Ricoh Kk Digital-kopiergeraet
DE3014670A1 (de) * 1979-04-16 1980-10-23 Ricoh Kk Faksimile-sende-empfaenger

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
JP 54-84419A = JP 54-84419A in: Patents Abstracts of Japan, Section E, Vol.3, 1979,Nr.107 (E-136) *
JP 55-34514 A.: In: Patents Abstracts of Japan, Sect. E, Vol.4 (May 1980), No.63 (E-10) *
U. TIETZE, Ch. SCHENK: Halbleiterschaltungs- technik, 5.Aufl. 1980, Springer Verlag Ber- lin, S.680-683 *
U. TIETZE, Ch. SCHENK: Halbleiterschaltungs- technik, 5.Aufl., 1980, Springer Verlag Ber- lin, S.633-649 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181320A3 (de) * 1984-11-08 1988-06-22 MUPID COMPUTER GESELLSCHAFT m.b.H. Anordnung zur Speicherung einer Bildvorlage in einem Digitalspeicher

Also Published As

Publication number Publication date
JPS5746573A (en) 1982-03-17
JPS6411193B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-02-23
US4539600A (en) 1985-09-03

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Legal Events

Date Code Title Description
8128 New person/name/address of the agent

Representative=s name: SCHWABE, H., DIPL.-ING. SANDMAIR, K., DIPL.-CHEM.

8110 Request for examination paragraph 44
8131 Rejection