JPS5476008A - Shading correcting device - Google Patents
Shading correcting deviceInfo
- Publication number
- JPS5476008A JPS5476008A JP14447477A JP14447477A JPS5476008A JP S5476008 A JPS5476008 A JP S5476008A JP 14447477 A JP14447477 A JP 14447477A JP 14447477 A JP14447477 A JP 14447477A JP S5476008 A JPS5476008 A JP S5476008A
- Authority
- JP
- Japan
- Prior art keywords
- manuscript
- information
- solid
- amplifier
- scanning
- 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
Abstract
PURPOSE: To secure the shading correction with no elimination of the effective component by comparing the output signal of the solid scanner to the manuscript surface of the reference white level with the reference level, converting the error signal into the digital signal to be then drawn out in accordance with the manuscript scanning, and then controlling the gain of the voltage control amplifier.
CONSTITUTION: The shading correction is given to the picture signals given from the solid scanner which gives the photoelectric conversion to the light from the manuscript surface by the solid scanning element and through the image formation optical system. In such correcting device, the manuscript of the reference white level featuring a fixed reflection factor to the full width of the manuscript. Then the information of the reference white level is read by solid scanning element 13, and this read information is given to error voltage amplifier 16 via voltage control amplifier 14 to be compared with reference voltage VRef. And the error voltage undergoes the digital conversion through A/D converter 17 and are memorized in shift register 19 and 20. The memorized information is read out according to the manuscript scanning of element 13 and then converted to the analog signal via D/A converter. With this information, the gain of amplifier 14 is controlled.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14447477A JPS5476008A (en) | 1977-11-30 | 1977-11-30 | Shading correcting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14447477A JPS5476008A (en) | 1977-11-30 | 1977-11-30 | Shading correcting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476008A true JPS5476008A (en) | 1979-06-18 |
Family
ID=15363128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14447477A Pending JPS5476008A (en) | 1977-11-30 | 1977-11-30 | Shading correcting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476008A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59100666A (en) * | 1982-11-30 | 1984-06-09 | Matsushita Graphic Commun Syst Inc | Eprom writer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979733A (en) * | 1972-11-13 | 1974-08-01 | ||
JPS5011531A (en) * | 1973-05-31 | 1975-02-06 |
-
1977
- 1977-11-30 JP JP14447477A patent/JPS5476008A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979733A (en) * | 1972-11-13 | 1974-08-01 | ||
JPS5011531A (en) * | 1973-05-31 | 1975-02-06 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59100666A (en) * | 1982-11-30 | 1984-06-09 | Matsushita Graphic Commun Syst Inc | Eprom writer |
JPH0522432B2 (en) * | 1982-11-30 | 1993-03-29 | Matsushita Graphic Communic |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU551349B2 (en) | Conversion of video signals to photographic prints | |
JPS54130828A (en) | Photo sensor array device and image scanner using it | |
US4723174A (en) | Picture image processor | |
CA2034223A1 (en) | Image data processing apparatus | |
KR930022893A (en) | Color video camera device | |
JPS57152268A (en) | Reference information reading system | |
JPS5476008A (en) | Shading correcting device | |
TW325631B (en) | A digital video camera system | |
JPS57104370A (en) | Shading correcting device | |
JPS55108080A (en) | Photo electric conversion unit | |
JPS6437178A (en) | Digital video camera | |
JPS5335312A (en) | Conversion system for facsimile line density | |
JPS54158115A (en) | Shading correction device | |
JPS55121579A (en) | Picture reader | |
JPS565762A (en) | Automatic adjusting circuit for background density in stencil paper making machine | |
JPS5620383A (en) | Original reader | |
JPH026702Y2 (en) | ||
JPS5442927A (en) | Pickup device | |
JPS5668875A (en) | Binary system | |
JPS6151820B2 (en) | ||
JPS5775063A (en) | Picture signal processing device | |
JPS57105734A (en) | Image pickup system by infrared rays | |
JPS5725776A (en) | Processing system of picture signal | |
JPS5787284A (en) | Solid image sensor | |
WO1997012481A3 (en) | Optoelectronic scanning process and device |