JPS55140974A - Information processor - Google Patents

Information processor

Info

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
Application number
JP4947679A
Other languages
Japanese (ja)
Other versions
JPH0152952B2 (en
Inventor
Shin Tsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP4947679A priority Critical patent/JPS55140974A/en
Publication of JPS55140974A publication Critical patent/JPS55140974A/en
Publication of JPH0152952B2 publication Critical patent/JPH0152952B2/ja
Granted legal-status Critical Current

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
JP4947679A 1979-04-20 1979-04-20 Information processor Granted JPS55140974A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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