DE2106308B2 - Schwellwert-Steuerschaltung für die Erkennung von Zeichen auf einem Schriftstück - Google Patents
Schwellwert-Steuerschaltung für die Erkennung von Zeichen auf einem SchriftstückInfo
- Publication number
- DE2106308B2 DE2106308B2 DE2106308A DE2106308A DE2106308B2 DE 2106308 B2 DE2106308 B2 DE 2106308B2 DE 2106308 A DE2106308 A DE 2106308A DE 2106308 A DE2106308 A DE 2106308A DE 2106308 B2 DE2106308 B2 DE 2106308B2
- Authority
- DE
- Germany
- Prior art keywords
- voltage
- threshold
- circuit
- document
- converter
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/16—Image preprocessing
- G06V30/162—Quantising the image signal
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Landscapes
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Character Input (AREA)
- Facsimile Image Signal Circuits (AREA)
- Manipulation Of Pulses (AREA)
- Character Discrimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1349070A | 1970-02-24 | 1970-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2106308A1 DE2106308A1 (de) | 1971-09-02 |
| DE2106308B2 true DE2106308B2 (de) | 1980-11-13 |
Family
ID=21760230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2106308A Withdrawn DE2106308B2 (de) | 1970-02-24 | 1971-02-10 | Schwellwert-Steuerschaltung für die Erkennung von Zeichen auf einem Schriftstück |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3675201A (cg-RX-API-DMAC7.html) |
| JP (1) | JPS5548337B1 (cg-RX-API-DMAC7.html) |
| CA (1) | CA925210A (cg-RX-API-DMAC7.html) |
| DE (1) | DE2106308B2 (cg-RX-API-DMAC7.html) |
| FR (1) | FR2078002A5 (cg-RX-API-DMAC7.html) |
| GB (1) | GB1279375A (cg-RX-API-DMAC7.html) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3778768A (en) * | 1971-08-27 | 1973-12-11 | Little Inc A | Character detection system |
| US3849650A (en) * | 1973-03-29 | 1974-11-19 | Picker Corp | Automatic x-ray inspection system |
| US3973239A (en) * | 1973-10-17 | 1976-08-03 | Hitachi, Ltd. | Pattern preliminary processing system |
| US3909594A (en) * | 1973-12-26 | 1975-09-30 | Interface Mechanisms Inc | Circuit for establishing a reference voltage in bar code readers |
| US4034342A (en) * | 1974-12-23 | 1977-07-05 | Burroughs Corporation | Magnetic character recognition system employing a dynamic threshold voltage determination system |
| IT1068657B (it) * | 1976-11-03 | 1985-03-21 | Nuovo Pignone Spa | Metodo perfezionato per il controllo di banconote ed apparecchiature per realizzarlo |
| US4078227A (en) * | 1977-03-21 | 1978-03-07 | The Singer Company | Threshold detector for optical character recognition system |
| US4162408A (en) * | 1977-10-17 | 1979-07-24 | Bourns, Inc. | Optical mark sense detector |
| US4337455A (en) * | 1978-04-21 | 1982-06-29 | Caere Corporation | Apparatus for processing video signals received from an optical scanner |
| JPS5534704A (en) * | 1978-08-31 | 1980-03-11 | Hajime Sangyo Kk | Threshold setting circuit |
| US4230265A (en) * | 1979-05-07 | 1980-10-28 | Transaction Technology, Inc. | Adaptive threshold optical reader |
| US4227218A (en) * | 1978-12-14 | 1980-10-07 | Exxon Research & Engineering Co. | Method and apparatus for generating a digital facsimile signal |
| GB2054927B (en) * | 1979-07-20 | 1984-01-11 | Sumitomo Electric Industries | Binary coding circuit |
| DE3019836A1 (de) * | 1980-05-23 | 1982-01-21 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum automatischen erkennen von bild- und text- oder graphikbereichen auf druckvorlagen |
| JPS57116477A (en) * | 1981-01-09 | 1982-07-20 | Fuji Xerox Co Ltd | Scanning type document reader |
| US4468704A (en) * | 1982-10-28 | 1984-08-28 | Xerox Corporation | Adaptive thresholder |
| US4578711A (en) * | 1983-12-28 | 1986-03-25 | International Business Machines (Ibm) | Video data signal digitization and correction system |
| US5194966A (en) * | 1990-11-20 | 1993-03-16 | Educational Testing Service | Optical scanner threshold setting method and sheet |
| US5969325A (en) * | 1996-06-03 | 1999-10-19 | Accu-Sort Systems, Inc. | High speed image acquisition system and method of processing and decoding barcode symbol |
| US5861616A (en) * | 1996-10-01 | 1999-01-19 | Mustek Systems, Inc. | Method and device for recognizing a waveform of an analog signal |
| US6016960A (en) * | 1997-07-08 | 2000-01-25 | Intermec Ip Corporation | Rule based method and apparatus for processing reflectance signals from machine-readable symbols or images |
| US6012640A (en) * | 1997-07-08 | 2000-01-11 | Intermec Ip Corporation | Rule based and fuzzy logic method and apparatus for processing reflectance signals from machine-readable symbols or images |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3159815A (en) * | 1961-11-29 | 1964-12-01 | Ibm | Digitalization system for multi-track optical character sensing |
| US3415950A (en) * | 1965-03-29 | 1968-12-10 | Ibm | Video quantizing system |
| US3484747A (en) * | 1965-06-07 | 1969-12-16 | Recognition Equipment Inc | Digital-analog retina output conditioning |
| JPS4412407Y1 (cg-RX-API-DMAC7.html) * | 1965-11-30 | 1969-05-23 | ||
| US3432032A (en) * | 1966-06-24 | 1969-03-11 | Fmc Corp | Presorting method and apparatus |
-
1970
- 1970-02-24 US US13490A patent/US3675201A/en not_active Expired - Lifetime
-
1971
- 1971-02-01 FR FR7103211A patent/FR2078002A5/fr not_active Expired
- 1971-02-10 CA CA104996A patent/CA925210A/en not_active Expired
- 1971-02-10 DE DE2106308A patent/DE2106308B2/de not_active Withdrawn
- 1971-02-10 JP JP592671A patent/JPS5548337B1/ja active Pending
- 1971-04-19 GB GB21382/71A patent/GB1279375A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1279375A (en) | 1972-06-28 |
| FR2078002A5 (cg-RX-API-DMAC7.html) | 1971-11-05 |
| US3675201A (en) | 1972-07-04 |
| CA925210A (en) | 1973-04-24 |
| DE2106308A1 (de) | 1971-09-02 |
| JPS5548337B1 (cg-RX-API-DMAC7.html) | 1980-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8263 | Opposition against grant of a patent | ||
| 8230 | Patent withdrawn |