JPS4915324A - - Google Patents
Info
- Publication number
- JPS4915324A JPS4915324A JP48034449A JP3444973A JPS4915324A JP S4915324 A JPS4915324 A JP S4915324A JP 48034449 A JP48034449 A JP 48034449A JP 3444973 A JP3444973 A JP 3444973A JP S4915324 A JPS4915324 A JP S4915324A
- 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.)
- Pending
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)
- Image Processing (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (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 |
|---|---|
| JPS4915324A true JPS4915324A (ja) | 1974-02-09 |
Family
ID=5840160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48034449A Pending JPS4915324A (ja) | 1972-03-25 | 1973-03-26 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3833883A (ja) |
| JP (1) | JPS4915324A (ja) |
| BE (1) | BE797210A (ja) |
| CH (1) | CH548069A (ja) |
| DE (1) | DE2214658C3 (ja) |
| FR (1) | FR2178628A5 (ja) |
| NL (1) | NL7304041A (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196430A (ja) * | 1983-04-22 | 1984-11-07 | Casio Comput Co Ltd | カラーグラフィックデータ処理装置 |
Families Citing this family (7)
| 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 |
| GB2098774B (en) * | 1979-07-20 | 1984-02-01 | 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 |
| 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 CH CH415273A patent/CH548069A/xx not_active IP Right Cessation
- 1973-03-22 NL NL7304041A patent/NL7304041A/xx unknown
- 1973-03-23 FR FR7310531A patent/FR2178628A5/fr not_active Expired
- 1973-03-23 BE BE129153A patent/BE797210A/xx unknown
- 1973-03-23 US US00344150A patent/US3833883A/en not_active Expired - Lifetime
- 1973-03-26 JP JP48034449A patent/JPS4915324A/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196430A (ja) * | 1983-04-22 | 1984-11-07 | Casio Comput Co Ltd | カラーグラフィックデータ処理装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US3833883A (en) | 1974-09-03 |
| DE2214658C3 (de) | 1974-12-19 |
| CH548069A (de) | 1974-04-11 |
| NL7304041A (ja) | 1973-09-27 |
| BE797210A (fr) | 1973-07-16 |
| DE2214658A1 (de) | 1973-10-04 |
| DE2214658B2 (de) | 1974-05-16 |
| FR2178628A5 (ja) | 1973-11-09 |