JPH0547150B2 - - Google Patents
Info
- Publication number
- JPH0547150B2 JPH0547150B2 JP62319327A JP31932787A JPH0547150B2 JP H0547150 B2 JPH0547150 B2 JP H0547150B2 JP 62319327 A JP62319327 A JP 62319327A JP 31932787 A JP31932787 A JP 31932787A JP H0547150 B2 JPH0547150 B2 JP H0547150B2
- Authority
- JP
- Japan
- Prior art keywords
- level
- image
- light source
- slice level
- image signal
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Facsimile Image Signal Circuits (AREA)
- Facsimile Scanning Arrangements (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319327A JPH01160165A (ja) | 1987-12-16 | 1987-12-16 | 画像読取装置 |
| US07/140,509 US4876605A (en) | 1987-01-12 | 1987-12-31 | Image reading device |
| EP19880300054 EP0275143A3 (en) | 1987-01-12 | 1988-01-06 | Image reading device |
| CA000556153A CA1285063C (en) | 1987-01-12 | 1988-01-08 | Image reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319327A JPH01160165A (ja) | 1987-12-16 | 1987-12-16 | 画像読取装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01160165A JPH01160165A (ja) | 1989-06-23 |
| JPH0547150B2 true JPH0547150B2 (cs) | 1993-07-15 |
Family
ID=18108949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62319327A Granted JPH01160165A (ja) | 1987-01-12 | 1987-12-16 | 画像読取装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160165A (cs) |
-
1987
- 1987-12-16 JP JP62319327A patent/JPH01160165A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01160165A (ja) | 1989-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4801788A (en) | Bar code scanner for a video signal which has a shading waveform | |
| US4876605A (en) | Image reading device | |
| JP4001711B2 (ja) | 画像読取装置 | |
| JPH0547150B2 (cs) | ||
| JPS5925267B2 (ja) | 光学文字読取装置 | |
| CA2063070C (en) | White level detection circuit for an optical image reader | |
| JPS6074773A (ja) | フイルムに対するイメ−ジセンサの補正方法 | |
| JPS63172565A (ja) | 光源不点灯検出装置 | |
| JPS6339141B2 (cs) | ||
| JPS6041364A (ja) | 光学的読み取り装置 | |
| JPS5894273A (ja) | コントラスト補正回路 | |
| JPS61224781A (ja) | シエ−デイング補正制御方式 | |
| JPH0666885B2 (ja) | 画像読取装置 | |
| US6850276B1 (en) | Method for detecting brightness signals from a multiplicity of light-sensitive sensor elements | |
| JP3859102B2 (ja) | 画像読取り装置 | |
| JPS61242170A (ja) | 信号処理装置 | |
| JPH0199370A (ja) | 読取部汚れ検出回路 | |
| JP3027400B2 (ja) | 画像２値化回路 | |
| JPS6212997Y2 (cs) | ||
| JPS63180267A (ja) | 光電変換装置 | |
| JPH03147479A (ja) | 画像読み取り装置 | |
| JPS60263513A (ja) | 信号２値化回路 | |
| JPH0253375A (ja) | 読取部汚れ検出回路 | |
| JPH0740718B2 (ja) | 画像処理装置 | |
| JPS6339274A (ja) | 画像読取装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080715 Year of fee payment: 15 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080715 Year of fee payment: 15 |