JPH01177660U - - Google Patents
Info
- Publication number
- JPH01177660U JPH01177660U JP1988074161U JP7416188U JPH01177660U JP H01177660 U JPH01177660 U JP H01177660U JP 1988074161 U JP1988074161 U JP 1988074161U JP 7416188 U JP7416188 U JP 7416188U JP H01177660 U JPH01177660 U JP H01177660U
- Authority
- JP
- Japan
- Prior art keywords
- peak value
- white peak
- reading device
- document
- white
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000013139 quantization Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
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
- G06J—HYBRID COMPUTING ARRANGEMENTS
- G06J1/00—Hybrid computing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Evolutionary Computation (AREA)
- Fuzzy Systems (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Multimedia (AREA)
- Image Input (AREA)
- Facsimile Image Signal Circuits (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988074161U JPH01177660U (US06272168-20010807-M00014.png) | 1988-06-02 | 1988-06-02 | |
| US07/360,075 US5093733A (en) | 1988-06-02 | 1989-06-01 | Image signal processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988074161U JPH01177660U (US06272168-20010807-M00014.png) | 1988-06-02 | 1988-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01177660U true JPH01177660U (US06272168-20010807-M00014.png) | 1989-12-19 |
Family
ID=13539152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988074161U Pending JPH01177660U (US06272168-20010807-M00014.png) | 1988-06-02 | 1988-06-02 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5093733A (US06272168-20010807-M00014.png) |
| JP (1) | JPH01177660U (US06272168-20010807-M00014.png) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0139657B1 (ko) * | 1994-11-09 | 1998-07-01 | 문정환 | 자동레벨선택기능을 가지는 신호수신장치 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093878A (ja) * | 1983-10-28 | 1985-05-25 | Canon Inc | 画像読取装置 |
| JPS61214865A (ja) * | 1985-03-20 | 1986-09-24 | Canon Inc | 画像処理装置 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55134574A (en) * | 1979-04-06 | 1980-10-20 | Oki Electric Ind Co Ltd | Picture signal processing circuit |
| US4578715A (en) * | 1983-02-14 | 1986-03-25 | Ricoh Company, Ltd. | Picture signal quantizing circuit |
| US4591826A (en) * | 1984-06-14 | 1986-05-27 | Harris Corporation | Gray code DAC ladder |
| US4847695A (en) * | 1986-02-06 | 1989-07-11 | Canon Kabushiki Kaisha | Image processing apparatus in which the minimum and maximum widths of a pulse-width modulated signal can be independently adjusted in accordance with predetermined data signals |
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1988
- 1988-06-02 JP JP1988074161U patent/JPH01177660U/ja active Pending
-
1989
- 1989-06-01 US US07/360,075 patent/US5093733A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093878A (ja) * | 1983-10-28 | 1985-05-25 | Canon Inc | 画像読取装置 |
| JPS61214865A (ja) * | 1985-03-20 | 1986-09-24 | Canon Inc | 画像処理装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US5093733A (en) | 1992-03-03 |
