JPS4991756A - - Google Patents
Info
- Publication number
- JPS4991756A JPS4991756A JP48138865A JP13886573A JPS4991756A JP S4991756 A JPS4991756 A JP S4991756A JP 48138865 A JP48138865 A JP 48138865A JP 13886573 A JP13886573 A JP 13886573A JP S4991756 A JPS4991756 A JP S4991756A
- 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
-
- 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
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
- H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
- H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
- Facsimile Image Signal Circuits (AREA)
- Facsimile Scanning Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31796472A | 1972-12-26 | 1972-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4991756A true JPS4991756A (ja) | 1974-09-02 |
Family
ID=23236028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48138865A Pending JPS4991756A (ja) | 1972-12-26 | 1973-12-14 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS4991756A (ja) |
| DE (1) | DE2363124A1 (ja) |
| FR (1) | FR2211814B1 (ja) |
| GB (1) | GB1451917A (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2505479A1 (de) * | 1975-02-10 | 1976-08-19 | Siemens Ag | Phasenkomparator und verfahren zu seinem betrieb |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT545970A (ja) * | 1954-12-29 | 1900-01-01 | ||
| US3662341A (en) * | 1970-09-25 | 1972-05-09 | Ibm | Video-derived segmentation-gating apparatus for optical character recognition |
-
1973
- 1973-11-20 FR FR7342446A patent/FR2211814B1/fr not_active Expired
- 1973-12-05 GB GB5640973A patent/GB1451917A/en not_active Expired
- 1973-12-14 JP JP48138865A patent/JPS4991756A/ja active Pending
- 1973-12-19 DE DE2363124A patent/DE2363124A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2363124A1 (de) | 1974-06-27 |
| FR2211814A1 (ja) | 1974-07-19 |
| GB1451917A (en) | 1976-10-06 |
| FR2211814B1 (ja) | 1976-06-25 |