JPS5685975A - Uniform illumination method - Google Patents
Uniform illumination methodInfo
- Publication number
- JPS5685975A JPS5685975A JP16250579A JP16250579A JPS5685975A JP S5685975 A JPS5685975 A JP S5685975A JP 16250579 A JP16250579 A JP 16250579A JP 16250579 A JP16250579 A JP 16250579A JP S5685975 A JPS5685975 A JP S5685975A
- Authority
- JP
- Japan
- Prior art keywords
- read
- illumination
- correction function
- distribution
- uniform illumination
- 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
- H04N1/40—Picture signal circuits
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
PURPOSE:To supply a uniform illumination to the object to be read, by correcting the illumination distribution of the illumination light source by the illumination distribution which is obtained from the object to be read. CONSTITUTION:In case when the object to be read 45 is read by the TV camera 41, the read result (c) is A/D-converted by the illumination distribution (a) on the surface of the object 45, and the sensitivity distribution (b) of the TV camera 41, moreover it is converted to a reciprocal, and it is stored in the correction function memory 48 as a correction function. The driver 49 modulates brightness by the place of the planar illumination light source by use of the correction function of the correction function memory 48, so that the information on the surface of the object 45 can be read with uniform intensity of illumination, as the illumination distribution (d) which has been corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16250579A JPS5685975A (en) | 1979-12-14 | 1979-12-14 | Uniform illumination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16250579A JPS5685975A (en) | 1979-12-14 | 1979-12-14 | Uniform illumination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5685975A true JPS5685975A (en) | 1981-07-13 |
Family
ID=15755887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16250579A Pending JPS5685975A (en) | 1979-12-14 | 1979-12-14 | Uniform illumination method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5685975A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61147666A (en) * | 1984-12-21 | 1986-07-05 | Toshiba Corp | Optical image reader |
| JPS62143355U (en) * | 1986-03-03 | 1987-09-10 | ||
| JPS62196460U (en) * | 1986-06-03 | 1987-12-14 | ||
| JPH01146460A (en) * | 1987-12-02 | 1989-06-08 | Sharp Corp | Picture reader |
| US5739928A (en) * | 1991-09-12 | 1998-04-14 | Eastman Kodak Company | Technique particularly suited for use in a print preview function for adapting CRT colorimetry to ambient lighting conditions |
| US20140028857A1 (en) * | 2011-04-29 | 2014-01-30 | Siemens Healthcare Diagnostics Inc. | High flux collimated illuminator and method of uniform field illumination |
-
1979
- 1979-12-14 JP JP16250579A patent/JPS5685975A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61147666A (en) * | 1984-12-21 | 1986-07-05 | Toshiba Corp | Optical image reader |
| JPS62143355U (en) * | 1986-03-03 | 1987-09-10 | ||
| JPS62196460U (en) * | 1986-06-03 | 1987-12-14 | ||
| JPH01146460A (en) * | 1987-12-02 | 1989-06-08 | Sharp Corp | Picture reader |
| US5739928A (en) * | 1991-09-12 | 1998-04-14 | Eastman Kodak Company | Technique particularly suited for use in a print preview function for adapting CRT colorimetry to ambient lighting conditions |
| US20140028857A1 (en) * | 2011-04-29 | 2014-01-30 | Siemens Healthcare Diagnostics Inc. | High flux collimated illuminator and method of uniform field illumination |
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