JPS6411473A - Original reader - Google Patents

Original reader

Info

Publication number
JPS6411473A
JPS6411473A JP62165463A JP16546387A JPS6411473A JP S6411473 A JPS6411473 A JP S6411473A JP 62165463 A JP62165463 A JP 62165463A JP 16546387 A JP16546387 A JP 16546387A JP S6411473 A JPS6411473 A JP S6411473A
Authority
JP
Japan
Prior art keywords
white reference
range
threshold
read
reading
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
Application number
JP62165463A
Other languages
Japanese (ja)
Inventor
Yoshiki Yoshida
Kiyoto Nagasawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP62165463A priority Critical patent/JPS6411473A/en
Publication of JPS6411473A publication Critical patent/JPS6411473A/en
Pending legal-status Critical Current

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Landscapes

  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To eliminate an abnormal picture due to the dust or the flaw of a white reference plate by providing a storing means and a means for controlling a data transfer from the storing means to a CPU and rereading the white reference of a different position at the time of having an abnormality after the white reference is read. CONSTITUTION:In a comparing and deciding mode next to a reference reading mode, the address of a RAM 26 is set according to an address count CA to compare data from the RAM 26 with a threshold. When it is lower than threshold, it is judged to be normal and when all range is normal, it is shifted to a picture reading mode. If there is a value higher than the threshold in one dot throughout all the range, the white reference is reread. When a sensor reading position does not exceed a white reference range, FSHD is reset to read the white reference and compare and decide again. When it exceeds the white reference range, a travel body is returned to a home position to change the reading timing of the FSHD and read the white reference of the different line. In such a way, the abnormal picture due to the stain or the flaw of the white reference plate can be eliminated.
JP62165463A 1987-07-03 1987-07-03 Original reader Pending JPS6411473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62165463A JPS6411473A (en) 1987-07-03 1987-07-03 Original reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62165463A JPS6411473A (en) 1987-07-03 1987-07-03 Original reader

Publications (1)

Publication Number Publication Date
JPS6411473A true JPS6411473A (en) 1989-01-17

Family

ID=15812895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62165463A Pending JPS6411473A (en) 1987-07-03 1987-07-03 Original reader

Country Status (1)

Country Link
JP (1) JPS6411473A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57152268A (en) * 1981-03-14 1982-09-20 Nec Corp Reference information reading system
JPS60246176A (en) * 1984-05-21 1985-12-05 Matsushita Electric Ind Co Ltd Picture reader
JPS61108260A (en) * 1984-10-31 1986-05-26 Fujitsu Ltd Shading correction system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57152268A (en) * 1981-03-14 1982-09-20 Nec Corp Reference information reading system
JPS60246176A (en) * 1984-05-21 1985-12-05 Matsushita Electric Ind Co Ltd Picture reader
JPS61108260A (en) * 1984-10-31 1986-05-26 Fujitsu Ltd Shading correction system

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