JPS55140974A - Information processor - Google Patents
Information processorInfo
- Publication number
- JPS55140974A JPS55140974A JP4947679A JP4947679A JPS55140974A JP S55140974 A JPS55140974 A JP S55140974A JP 4947679 A JP4947679 A JP 4947679A JP 4947679 A JP4947679 A JP 4947679A JP S55140974 A JPS55140974 A JP S55140974A
- Authority
- JP
- Japan
- Prior art keywords
- level
- signal
- threshold value
- levels
- mean
- 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.)
- Granted
Links
Landscapes
- Character Input (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
PURPOSE: To avoid the erroneous reading caused by the soiled area by providing the reference reflection part within the processor to read the white reference level, setting the 1st and 2nd levels based on the reference level and thus setting the threshold value.
CONSTITUTION: The scanning is given to original 12 irradiated by light source 11 and along scanning line 13, and then the information on line 13 is applied to pickup element 16 via lens system 15 to be converted into the electric signal via element 16. In this case, reference reflection part 18 is scanned immediately before or after scanning of original 12, and thus white reference signal 17a is produced to analog signal 17. Then signal 17 sent from element 16 is applied to detector 22, mean value circuit 27 and comparator 29 each in synchronization with the clock sent from control part 25. And the output of detector 22 is voltage-divided through voltage divider 24, and thus the 1st and 2nd levels are set featuring the threshold value higher than the 1st level the mean level of which is lower than the reference level and the threshold value lower than the 1st level the mean level of which is lower than the reference level. And then the comparision is given at comparator 29 between these levels and the level of supplied signal 17. Thus the binary coding is carried out.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4947679A JPS55140974A (en) | 1979-04-20 | 1979-04-20 | Information processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4947679A JPS55140974A (en) | 1979-04-20 | 1979-04-20 | Information processor |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61091870A Division JPS6264166A (en) | 1986-04-21 | 1986-04-21 | Image processor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55140974A true JPS55140974A (en) | 1980-11-04 |
JPH0152952B2 JPH0152952B2 (en) | 1989-11-10 |
Family
ID=12832200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4947679A Granted JPS55140974A (en) | 1979-04-20 | 1979-04-20 | Information processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55140974A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6316253A (en) * | 1986-07-09 | 1988-01-23 | Ya Man Ltd | Evaluating method for quality and accuracy of printing or print character |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4951809A (en) * | 1972-09-19 | 1974-05-20 | ||
JPS50126132A (en) * | 1974-03-23 | 1975-10-03 | ||
JPS53145525A (en) * | 1977-05-25 | 1978-12-18 | Oki Electric Ind Co Ltd | Optical character reader |
-
1979
- 1979-04-20 JP JP4947679A patent/JPS55140974A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4951809A (en) * | 1972-09-19 | 1974-05-20 | ||
JPS50126132A (en) * | 1974-03-23 | 1975-10-03 | ||
JPS53145525A (en) * | 1977-05-25 | 1978-12-18 | Oki Electric Ind Co Ltd | Optical character reader |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6316253A (en) * | 1986-07-09 | 1988-01-23 | Ya Man Ltd | Evaluating method for quality and accuracy of printing or print character |
Also Published As
Publication number | Publication date |
---|---|
JPH0152952B2 (en) | 1989-11-10 |
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