JPS541531B2 - - Google Patents
Info
- Publication number
- JPS541531B2 JPS541531B2 JP9595775A JP9595775A JPS541531B2 JP S541531 B2 JPS541531 B2 JP S541531B2 JP 9595775 A JP9595775 A JP 9595775A JP 9595775 A JP9595775 A JP 9595775A JP S541531 B2 JPS541531 B2 JP S541531B2
- Authority
- JP
- Japan
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
- H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
-
- 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nonlinear Science (AREA)
- Artificial Intelligence (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Manipulation Of Pulses (AREA)
- Facsimile Image Signal Circuits (AREA)
- Dc Digital Transmission (AREA)
- Picture Signal Circuits (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US496235A US3912943A (en) | 1974-08-09 | 1974-08-09 | Video thresholder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5141924A JPS5141924A (en:Method) | 1976-04-08 |
| JPS541531B2 true JPS541531B2 (en:Method) | 1979-01-25 |
Family
ID=23971803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9595775A Expired JPS541531B2 (en:Method) | 1974-08-09 | 1975-08-08 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3912943A (en:Method) |
| JP (1) | JPS541531B2 (en:Method) |
| BR (1) | BR7505040A (en:Method) |
| CA (1) | CA1048157A (en:Method) |
| DE (1) | DE2532358A1 (en:Method) |
| FR (1) | FR2281680A1 (en:Method) |
| GB (1) | GB1468624A (en:Method) |
| IT (1) | IT1039027B (en:Method) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4058705A (en) * | 1976-02-05 | 1977-11-15 | Cannon John W | Magnetic card reader |
| DE2800759C3 (de) * | 1978-01-09 | 1984-08-23 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Verfahren zur Umwandlung eines Videosignals in ein Zwei-Pegel-Signal |
| FR2425780A1 (fr) * | 1978-05-12 | 1979-12-07 | Cit Alcatel | Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image |
| DE2837139C3 (de) * | 1978-08-25 | 1982-02-25 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Verfahren und Schaltungsanordnung zur Impulsaufsteilung |
| JPS562728A (en) * | 1979-06-21 | 1981-01-13 | Matsushita Electric Ind Co Ltd | Binary processing circuit |
| US4367721A (en) * | 1979-08-08 | 1983-01-11 | Ford Motor Company | Signal detection circuit with self-adjusting threshold having modulated carrier input |
| US4496831A (en) * | 1980-02-29 | 1985-01-29 | Symbol Technologies, Inc. | Portable laser scanning system and scanning methods |
| US4593186A (en) * | 1980-02-29 | 1986-06-03 | Symbol Technologies, Inc. | Portable laser scanning system and scanning methods |
| SE448921B (sv) * | 1980-10-08 | 1987-03-23 | Ibm Svenska Ab | Videosignaldetektor for detektering av inkommande analoga videosignaler fran en optisk dokumentlesare och for avgivande av digitala utgangssignaler |
| SE448922B (sv) | 1980-10-21 | 1987-03-23 | Ibm Svenska Ab | Metod for behandling av videodata vid ett optiskt teckenidentifieringssystem jemte en anordning for teckenidentifiering i en optisk dokumentlesare |
| US4525747A (en) * | 1981-08-06 | 1985-06-25 | Toshiyuki Sakai | Analog-to-digital image signal conversion |
| US4409470A (en) | 1982-01-25 | 1983-10-11 | Symbol Technologies, Inc. | Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols |
| US4673805A (en) * | 1982-01-25 | 1987-06-16 | Symbol Technologies, Inc. | Narrow-bodied, single- and twin-windowed portable scanning head for reading bar code symbols |
| JPS5952417A (ja) * | 1982-09-16 | 1984-03-27 | Toshiba Corp | デ−タ抜取回路 |
| FR2565746A1 (fr) * | 1984-06-06 | 1985-12-13 | Sud Sa Systemes | Procede et dispositif de traitement d'un signal electrique analogique et application a la lecture de codes a barres |
| JPS62284519A (ja) * | 1986-06-02 | 1987-12-10 | Toshiba Corp | 信号検出回路 |
| DE3878718T2 (de) * | 1987-04-22 | 1993-09-02 | Abbott Lab | Abtaster und format eines optischen codes. |
| JP3556274B2 (ja) * | 1994-07-13 | 2004-08-18 | 富士通株式会社 | 二値化回路及びそれを用いたバーコードリーダ |
| US8155437B2 (en) * | 2007-09-07 | 2012-04-10 | CVISION Technologies, Inc. | Perceptually lossless color compression |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2885551A (en) * | 1955-11-30 | 1959-05-05 | Ibm | Variable voltage level discriminator varying with the input voltage level |
| US3566281A (en) * | 1968-05-21 | 1971-02-23 | Ibm | Electric pulse wave clipping circuitry |
| US3804979A (en) * | 1969-10-31 | 1974-04-16 | W Knowles | Detection devices for image analysis systems |
| US3708678A (en) * | 1970-10-30 | 1973-01-02 | Servo Corp | Variable threshold circuit |
-
1974
- 1974-08-09 US US496235A patent/US3912943A/en not_active Expired - Lifetime
-
1975
- 1975-06-09 FR FR7518984A patent/FR2281680A1/fr active Granted
- 1975-06-17 IT IT24420/75A patent/IT1039027B/it active
- 1975-07-07 CA CA230,888A patent/CA1048157A/en not_active Expired
- 1975-07-18 GB GB3018575A patent/GB1468624A/en not_active Expired
- 1975-07-19 DE DE19752532358 patent/DE2532358A1/de not_active Withdrawn
- 1975-08-07 BR BR7505040*A patent/BR7505040A/pt unknown
- 1975-08-08 JP JP9595775A patent/JPS541531B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BR7505040A (pt) | 1976-08-03 |
| CA1048157A (en) | 1979-02-06 |
| DE2532358A1 (de) | 1976-02-19 |
| GB1468624A (en) | 1977-03-30 |
| FR2281680A1 (fr) | 1976-03-05 |
| JPS5141924A (en:Method) | 1976-04-08 |
| IT1039027B (it) | 1979-12-10 |
| FR2281680B1 (en:Method) | 1978-06-09 |
| US3912943A (en) | 1975-10-14 |