FR2223701A1 - Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gates - Google Patents
Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gatesInfo
- Publication number
- FR2223701A1 FR2223701A1 FR7311619A FR7311619A FR2223701A1 FR 2223701 A1 FR2223701 A1 FR 2223701A1 FR 7311619 A FR7311619 A FR 7311619A FR 7311619 A FR7311619 A FR 7311619A FR 2223701 A1 FR2223701 A1 FR 2223701A1
- Authority
- FR
- France
- Prior art keywords
- signal
- circuit
- cct
- levels
- gates
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Theoretical Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Signal Processing (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Current Or Voltage (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7311619A FR2223701A1 (en) | 1973-03-30 | 1973-03-30 | Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7311619A FR2223701A1 (en) | 1973-03-30 | 1973-03-30 | Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gates |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2223701A1 true FR2223701A1 (en) | 1974-10-25 |
FR2223701B1 FR2223701B1 (fr) | 1976-05-21 |
Family
ID=9117185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7311619A Granted FR2223701A1 (en) | 1973-03-30 | 1973-03-30 | Signal processor for document analysis - detects the waveform gradients using electronic cct. with AND-NOT gates |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2223701A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2425780A1 (fr) * | 1978-05-12 | 1979-12-07 | Cit Alcatel | Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image |
FR2435871A1 (fr) * | 1978-09-08 | 1980-04-04 | Thomson Csf | Dispositif a seuil permettant de distinguer le blanc du noir sur un document, et emetteur de telecopie comportant un tel dispositif |
EP0033623A2 (fr) * | 1980-01-31 | 1981-08-12 | Ncr Canada Ltd - Ncr Canada Ltee | Procédé et appareil pour réduire la résolution de la gamme de gris d'une image numérisée |
-
1973
- 1973-03-30 FR FR7311619A patent/FR2223701A1/fr active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2425780A1 (fr) * | 1978-05-12 | 1979-12-07 | Cit Alcatel | Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image |
FR2435871A1 (fr) * | 1978-09-08 | 1980-04-04 | Thomson Csf | Dispositif a seuil permettant de distinguer le blanc du noir sur un document, et emetteur de telecopie comportant un tel dispositif |
EP0010010A1 (fr) * | 1978-09-08 | 1980-04-16 | Thomson-Csf | Dispositif à seuil permettant de distinguer le blanc du noir sur un document et émetteur de télécopie comportant un tel dispositif |
EP0033623A2 (fr) * | 1980-01-31 | 1981-08-12 | Ncr Canada Ltd - Ncr Canada Ltee | Procédé et appareil pour réduire la résolution de la gamme de gris d'une image numérisée |
EP0033623A3 (en) * | 1980-01-31 | 1982-01-20 | Ncr Canada Ltd - Ncr Canada Ltee | A method and apparatus for reducing the gray scale resolution of a digitized image |
Also Published As
Publication number | Publication date |
---|---|
FR2223701B1 (fr) | 1976-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |