JPS5484916A - Picture read-in unit - Google Patents

Picture read-in unit

Info

Publication number
JPS5484916A
JPS5484916A JP15333977A JP15333977A JPS5484916A JP S5484916 A JPS5484916 A JP S5484916A JP 15333977 A JP15333977 A JP 15333977A JP 15333977 A JP15333977 A JP 15333977A JP S5484916 A JPS5484916 A JP S5484916A
Authority
JP
Japan
Prior art keywords
original
scanning
read
width
picture
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
JP15333977A
Other languages
Japanese (ja)
Inventor
Fumihiro Ogasawara
Shuichi Takahashi
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 JP15333977A priority Critical patent/JPS5484916A/en
Publication of JPS5484916A publication Critical patent/JPS5484916A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To avoid disturbance of binary processing, by making the threshold voltage for binarization to correct set ratio to the analog signal of original picture, through the illumination of original from the time when read-in scanning enters the width of original in facsimile.
CONSTITUTION: The picture information at each part of original is obtained sequentially as analog signal with the read-in head 7 receiving ligth with the solidstate photoelectric conversion element for the reflection light radiated on the original DP for the lamp or the scanning of electronic circuit of solidstate photoelectric conversion element or scanning by mechanical driving of reflection mirror, and this is converted into binary picture signal with the picture signal processor. In this case, the illumination control means 5 controlling the amount of illumination light for the original is controlled with the original width scanning period display signal from the read-in width timing circuit 6 producing the signal representing that the read-in scanning enters the range of original width substantially.
COPYRIGHT: (C)1979,JPO&Japio
JP15333977A 1977-12-20 1977-12-20 Picture read-in unit Pending JPS5484916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15333977A JPS5484916A (en) 1977-12-20 1977-12-20 Picture read-in unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15333977A JPS5484916A (en) 1977-12-20 1977-12-20 Picture read-in unit

Publications (1)

Publication Number Publication Date
JPS5484916A true JPS5484916A (en) 1979-07-06

Family

ID=15560302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15333977A Pending JPS5484916A (en) 1977-12-20 1977-12-20 Picture read-in unit

Country Status (1)

Country Link
JP (1) JPS5484916A (en)

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