DE2935312C2 - - Google Patents
Info
- Publication number
- DE2935312C2 DE2935312C2 DE2935312A DE2935312A DE2935312C2 DE 2935312 C2 DE2935312 C2 DE 2935312C2 DE 2935312 A DE2935312 A DE 2935312A DE 2935312 A DE2935312 A DE 2935312A DE 2935312 C2 DE2935312 C2 DE 2935312C2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- threshold value
- input
- image
- pixel
- 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.)
- Expired
Links
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Analysis (AREA)
- Manipulation Of Pulses (AREA)
- Image Input (AREA)
- Image Processing (AREA)
- Electronic Switches (AREA)
- Facsimile Image Signal Circuits (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Closed-Circuit Television Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10661378A JPS5534704A (en) | 1978-08-31 | 1978-08-31 | Threshold setting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2935312A1 DE2935312A1 (de) | 1980-03-13 |
DE2935312C2 true DE2935312C2 (US08124317-20120228-C00018.png) | 1988-08-25 |
Family
ID=14437962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19792935312 Granted DE2935312A1 (de) | 1978-08-31 | 1979-08-31 | Schwellenwertregler fuer geraete zum extrahieren eines bestimmten rasterbildes oder musters aus dem bildinhalt eines videosensors o.dgl. |
Country Status (6)
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4442544A (en) * | 1981-07-09 | 1984-04-10 | Xerox Corporation | Adaptive thresholder |
US4500202A (en) * | 1982-05-24 | 1985-02-19 | Itek Corporation | Printed circuit board defect detection of detecting maximum line width violations |
US4578810A (en) * | 1983-08-08 | 1986-03-25 | Itek Corporation | System for printed circuit board defect detection |
JPS61189086A (ja) * | 1985-02-15 | 1986-08-22 | Fuji Electric Co Ltd | 画像の明暗分布表示装置 |
JP2625723B2 (ja) * | 1987-05-23 | 1997-07-02 | トヨタ自動車株式会社 | 画像2値化処理装置 |
FR2622992B1 (fr) * | 1987-11-06 | 1990-02-09 | Thomson Semiconducteurs | Procede de lecture de codes a barres |
DE59408891D1 (de) * | 1993-09-20 | 1999-12-09 | Thomson Brandt Gmbh | Schaltung zur steuerung mit mehreren sensoren |
US6074790A (en) * | 1994-11-17 | 2000-06-13 | Texas Instruments Incorporated | Black and white defect correction for a digital micromirror printer |
US20070081239A1 (en) * | 2005-10-06 | 2007-04-12 | May Gregory J | Optical characteristics of a screen |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3225213A (en) * | 1962-05-18 | 1965-12-21 | Beckman Instruments Inc | Transition detector |
DE1247051B (de) * | 1965-06-18 | 1967-08-10 | Siemens Ag | Schaltungsanordnung zum Ausgleich von Kontrastaenderungen bei der Digitalisierung von Video-Signalen |
DE1549910A1 (de) * | 1967-05-10 | 1971-05-27 | Telefunken Patent | Einrichtung zur maschinellen Erkennung von Zeichen |
US3675201A (en) * | 1970-02-24 | 1972-07-04 | Burroughs Corp | Threshold voltage determination system |
US3668634A (en) * | 1970-05-06 | 1972-06-06 | Burroughs Corp | Dynamic threshold voltage determination system |
GB1383740A (en) * | 1971-02-25 | 1974-02-12 | Image Analysing Computers Ltd | Detection devices for image analysis systems |
US3701099A (en) * | 1971-06-08 | 1972-10-24 | Ibm | Dynamic discrimination reference level generator for a parallel channel optical document scanner |
US3820068A (en) * | 1972-06-29 | 1974-06-25 | Westinghouse Learning Corp | Background reference level system and method for document scanners |
US4034342A (en) * | 1974-12-23 | 1977-07-05 | Burroughs Corporation | Magnetic character recognition system employing a dynamic threshold voltage determination system |
SE387445B (sv) * | 1974-12-23 | 1976-09-06 | Asea Ab | Anordning vid signaldetektering |
-
1978
- 1978-08-31 JP JP10661378A patent/JPS5534704A/ja active Pending
-
1979
- 1979-08-29 US US06/070,908 patent/US4259662A/en not_active Expired - Lifetime
- 1979-08-29 FR FR7921641A patent/FR2435092B1/fr not_active Expired
- 1979-08-30 CA CA334,757A patent/CA1131786A/en not_active Expired
- 1979-08-30 GB GB7930078A patent/GB2031240B/en not_active Expired
- 1979-08-31 DE DE19792935312 patent/DE2935312A1/de active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5534704A (en) | 1980-03-11 |
FR2435092B1 (fr) | 1987-12-24 |
GB2031240A (en) | 1980-04-16 |
CA1131786A (en) | 1982-09-14 |
US4259662A (en) | 1981-03-31 |
GB2031240B (en) | 1983-03-30 |
DE2935312A1 (de) | 1980-03-13 |
FR2435092A1 (fr) | 1980-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3637017C2 (de) | Schaltungsanordnung zur Erfassung von Bildbewegung in einem Videosignal | |
DE3600330C2 (de) | Dreifarben-Kathodenstrahlröhrenanordnung | |
WO1996019778A1 (de) | Verfahren zur trennung einer vordergrundinformation von einer hintergrundinformation in einer vorlage | |
DE19914518A1 (de) | Verfahren und Vorrichtung zur Lichtquellenunterscheidung, Hautfarbenkorrektur und Farbbildkorrektur und computerlesbares Speichermedium dafür | |
DE2939457A1 (de) | Verfahren zur hervorhebung eines bildbereiches innerhalb eines bildes, das auf einem bildschirm dargestellt wird | |
DE3732435C2 (US08124317-20120228-C00018.png) | ||
DE69121313T2 (de) | Vorrichtung zur Kontrastkorrektur | |
DE69125869T2 (de) | Gradationskorrekturvorrichtung | |
EP0059705B1 (de) | Verfahren und schaltungsanordnung zur partiellen korrektur der zeichnung bei der farbbildreproduktion | |
DE3134703A1 (de) | Flimmern verhindernde schaltung | |
DE3138226C2 (US08124317-20120228-C00018.png) | ||
DE2935312C2 (US08124317-20120228-C00018.png) | ||
DE2011470A1 (de) | Verfahren zum Auswerten eines nach einem Rasterverfahren aufgenommenen Bildes | |
DE3721326C2 (US08124317-20120228-C00018.png) | ||
DE2415973A1 (de) | Bildanalysiereinrichtung | |
DE1166522B (de) | Anordnung zum lichtelektrischen Abtasten von Schriftzeichen | |
DE69210312T2 (de) | Anzeigeeinheit | |
DE4004948C2 (US08124317-20120228-C00018.png) | ||
EP0753231B1 (de) | Verfahren und vorrichtung zum binarisieren von pixel-daten | |
DE3625281C2 (de) | Bildverarbeitungssystem mit farbunterscheidung | |
DE2450529C3 (de) | Verfahren und Vorrichtung zur Erzeugung binärer Signale | |
DE2217281A1 (de) | Dichtenmessung durch Bildanalyse. > | |
EP0950310A1 (de) | Verfahren zur bestimmung der geometriedaten von abtastvorlagen | |
DE4038220C2 (de) | Verfahren und Anordnung zur Kompensation eines Bildsignals gegenüber Beleuchtungsänderungen | |
EP0392977B1 (de) | Kompensationsschaltung zur Korrektur von Bildfehlern eines Bildprojektionssystems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |