CH548069A - Schaltung zur schwellenwertbildung. - Google Patents
Schaltung zur schwellenwertbildung.Info
- Publication number
- CH548069A CH548069A CH415273A CH415273A CH548069A CH 548069 A CH548069 A CH 548069A CH 415273 A CH415273 A CH 415273A CH 415273 A CH415273 A CH 415273A CH 548069 A CH548069 A CH 548069A
- Authority
- CH
- Switzerland
- Prior art keywords
- thresholding
- circuit
- Prior art date
Links
Classifications
-
- 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
-
- 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)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Character Input (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Image Processing (AREA)
- Image Input (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2214658A DE2214658C3 (de) | 1972-03-25 | 1972-03-25 | Schaltung zur Schwellenwertbüdung |
Publications (1)
Publication Number | Publication Date |
---|---|
CH548069A true CH548069A (de) | 1974-04-11 |
Family
ID=5840160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH415273A CH548069A (de) | 1972-03-25 | 1973-03-22 | Schaltung zur schwellenwertbildung. |
Country Status (7)
Country | Link |
---|---|
US (1) | US3833883A (de) |
JP (1) | JPS4915324A (de) |
BE (1) | BE797210A (de) |
CH (1) | CH548069A (de) |
DE (1) | DE2214658C3 (de) |
FR (1) | FR2178628A5 (de) |
NL (1) | NL7304041A (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4337455A (en) * | 1978-04-21 | 1982-06-29 | Caere Corporation | Apparatus for processing video signals received from an optical scanner |
GB2054927B (en) * | 1979-07-20 | 1984-01-11 | Sumitomo Electric Industries | Binary coding circuit |
US4442544A (en) * | 1981-07-09 | 1984-04-10 | Xerox Corporation | Adaptive thresholder |
JPS59106079A (ja) * | 1982-12-10 | 1984-06-19 | Omron Tateisi Electronics Co | 図形照合装置の二値化装置 |
JPH0658262B2 (ja) * | 1983-04-22 | 1994-08-03 | カシオ計算機株式会社 | カラーグラフィックデータ処理装置 |
US4644410A (en) * | 1985-03-11 | 1987-02-17 | R. A. McDonald | Dynamic threshold binary generator |
US4857903A (en) * | 1986-05-06 | 1989-08-15 | Summagraphics Corporation | Electro-optical mouse with improved resolution for compensation of optical distortion |
US4807166A (en) * | 1986-09-19 | 1989-02-21 | Summagraphics Corporation | Method and apparatus for calibrating an electro-optical mouse |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3560931A (en) * | 1969-03-26 | 1971-02-02 | Ibm | Circuitry to improve resolution in character recognition |
US3701099A (en) * | 1971-06-08 | 1972-10-24 | Ibm | Dynamic discrimination reference level generator for a parallel channel optical document scanner |
-
1972
- 1972-03-25 DE DE2214658A patent/DE2214658C3/de not_active Expired
-
1973
- 1973-03-22 NL NL7304041A patent/NL7304041A/xx unknown
- 1973-03-22 CH CH415273A patent/CH548069A/de not_active IP Right Cessation
- 1973-03-23 US US00344150A patent/US3833883A/en not_active Expired - Lifetime
- 1973-03-23 BE BE129153A patent/BE797210A/xx unknown
- 1973-03-23 FR FR7310531A patent/FR2178628A5/fr not_active Expired
- 1973-03-26 JP JP48034449A patent/JPS4915324A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2214658B2 (de) | 1974-05-16 |
DE2214658C3 (de) | 1974-12-19 |
JPS4915324A (de) | 1974-02-09 |
DE2214658A1 (de) | 1973-10-04 |
NL7304041A (de) | 1973-09-27 |
BE797210A (fr) | 1973-07-16 |
US3833883A (en) | 1974-09-03 |
FR2178628A5 (de) | 1973-11-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |