JPS6426281A - Image reading device - Google Patents

Image reading device

Info

Publication number
JPS6426281A
JPS6426281A JP62117911A JP11791187A JPS6426281A JP S6426281 A JPS6426281 A JP S6426281A JP 62117911 A JP62117911 A JP 62117911A JP 11791187 A JP11791187 A JP 11791187A JP S6426281 A JPS6426281 A JP S6426281A
Authority
JP
Japan
Prior art keywords
image
converter
pick
counters
outputs
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
JP62117911A
Other languages
Japanese (ja)
Inventor
Katsuyuki Ikeda
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP62117911A priority Critical patent/JPS6426281A/en
Publication of JPS6426281A publication Critical patent/JPS6426281A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To attain the half tone display of a high quality with a low cost by comparing the output of a DA converter, which outputs an analog value corresponding to the output of a counter to count the low order two bits of the address of an image pick-up element in X and Y directions, and an image signal selected by the image-pick up element. CONSTITUTION:The titled device is composed of clock signal generating circuits 102 and 103 to generate a signal to execute a division to the resolution extent of the main and sub-scanning directions of an image-pick up element 101, two counters 104 and 105 to count the signals of the clock generating circuits 102 and 103, a DA converter 106 to DA-convert the outputs of the counters 104 and 105 and a comparing circuit 107 to compare the voltage value of an analog image signal obtained from the image-pick up element 101 and the output of the DA converter 106. The connection between the outputs of the counters 104 and 105 and the DA converter 106 is contrived. Thus, an optimum dither pattern can be obtained by a simple circuit.
JP62117911A 1987-01-07 1987-05-14 Image reading device Pending JPS6426281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62117911A JPS6426281A (en) 1987-01-07 1987-05-14 Image reading device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP131387 1987-01-07
JP62117911A JPS6426281A (en) 1987-01-07 1987-05-14 Image reading device

Publications (1)

Publication Number Publication Date
JPS6426281A true JPS6426281A (en) 1989-01-27

Family

ID=26334516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62117911A Pending JPS6426281A (en) 1987-01-07 1987-05-14 Image reading device

Country Status (1)

Country Link
JP (1) JPS6426281A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03198242A (en) * 1990-05-30 1991-08-29 Sharp Corp Magneto-optical recording and reproducing device
JP2007308194A (en) * 2006-05-22 2007-11-29 Nippon Electric Glass Co Ltd Spacer for packing glass plate and packaging and packing method using the spacer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572762B2 (en) * 1973-08-13 1982-01-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572762B2 (en) * 1973-08-13 1982-01-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03198242A (en) * 1990-05-30 1991-08-29 Sharp Corp Magneto-optical recording and reproducing device
JP2007308194A (en) * 2006-05-22 2007-11-29 Nippon Electric Glass Co Ltd Spacer for packing glass plate and packaging and packing method using the spacer

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