JPS57211871A - Image reader - Google Patents
Image readerInfo
- Publication number
- JPS57211871A JPS57211871A JP56097281A JP9728181A JPS57211871A JP S57211871 A JPS57211871 A JP S57211871A JP 56097281 A JP56097281 A JP 56097281A JP 9728181 A JP9728181 A JP 9728181A JP S57211871 A JPS57211871 A JP S57211871A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- line sensor
- blue
- green
- red
- 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
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
- H04N1/46—Colour picture communication systems
- H04N1/48—Picture signal generators
- H04N1/482—Picture signal generators using the same detector device sequentially for different colour components
Abstract
PURPOSE:To make output characteristics for respective primary colors of a line sensor coincide with each other by selecting the range of color filters for making respective primary colors transmit according to the spectral sensitivity of respective primary colors of the line sensor. CONSTITUTION:The filter ranges (divided ranges of respective color filters, red, green, blue) of a color filter 20 applied on the front of a line sensor 10 is changed according to the spectral sensitivity. The disc-like color filter 20 is constituted so as to be rotated and the ranges of a red filter 20R, a green filter 20G and a blue filter 20B are approximately set to the rate of 1:1:2. Consequently the output level of the line sensor for blue can be increased twice without sharp increase of the output levels for red and green, improving remarkable unevenness of output characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56097281A JPS57211871A (en) | 1981-06-23 | 1981-06-23 | Image reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56097281A JPS57211871A (en) | 1981-06-23 | 1981-06-23 | Image reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57211871A true JPS57211871A (en) | 1982-12-25 |
Family
ID=14188123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56097281A Pending JPS57211871A (en) | 1981-06-23 | 1981-06-23 | Image reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57211871A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62235887A (en) * | 1986-04-07 | 1987-10-16 | Nippon Denso Co Ltd | Color night vision device |
US4731661A (en) * | 1984-11-16 | 1988-03-15 | Sharp Kabushiki Kaisha | Color document reader with white balance adjuster for determining light emission periods for a plurality of different-colored light sources and corresponding integration times for a light sensor by reading a white reference area |
US4809062A (en) * | 1984-11-14 | 1989-02-28 | Microtek Lab., Inc. | Optical color line scanning and imaging device having a roller drive |
EP0324107A2 (en) * | 1988-01-09 | 1989-07-19 | Robert Bosch Gmbh | Colour-television camera |
JPH0289463A (en) * | 1988-09-27 | 1990-03-29 | Nec Home Electron Ltd | Color filter |
US4937663A (en) * | 1987-09-08 | 1990-06-26 | Truvel Corporation | Apparatus for scanning and recording a color image having a scanning element with scanning periods equal to the reciprocal of the flicker rate of a light source illuminating the color image and a rotating multi-segment color filter |
US5177501A (en) * | 1989-11-13 | 1993-01-05 | Alcatel N.V. | Electrooptical recording device |
EP0615146A3 (en) * | 1993-03-03 | 1995-01-04 | Texas Instruments Inc | Monolithic color wheel. |
FR2708734A1 (en) * | 1993-07-31 | 1995-02-10 | Samsung Electronics Co Ltd | Image analyzer. |
-
1981
- 1981-06-23 JP JP56097281A patent/JPS57211871A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4809062A (en) * | 1984-11-14 | 1989-02-28 | Microtek Lab., Inc. | Optical color line scanning and imaging device having a roller drive |
US4731661A (en) * | 1984-11-16 | 1988-03-15 | Sharp Kabushiki Kaisha | Color document reader with white balance adjuster for determining light emission periods for a plurality of different-colored light sources and corresponding integration times for a light sensor by reading a white reference area |
JPS62235887A (en) * | 1986-04-07 | 1987-10-16 | Nippon Denso Co Ltd | Color night vision device |
US4937663A (en) * | 1987-09-08 | 1990-06-26 | Truvel Corporation | Apparatus for scanning and recording a color image having a scanning element with scanning periods equal to the reciprocal of the flicker rate of a light source illuminating the color image and a rotating multi-segment color filter |
EP0324107A2 (en) * | 1988-01-09 | 1989-07-19 | Robert Bosch Gmbh | Colour-television camera |
JPH0289463A (en) * | 1988-09-27 | 1990-03-29 | Nec Home Electron Ltd | Color filter |
US5177501A (en) * | 1989-11-13 | 1993-01-05 | Alcatel N.V. | Electrooptical recording device |
EP0615146A3 (en) * | 1993-03-03 | 1995-01-04 | Texas Instruments Inc | Monolithic color wheel. |
FR2708734A1 (en) * | 1993-07-31 | 1995-02-10 | Samsung Electronics Co Ltd | Image analyzer. |
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