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JPS6432765A - Image binarization device - Google Patents

Image binarization device

Info

Publication number
JPS6432765A
JPS6432765A JP62187504A JP18750487A JPS6432765A JP S6432765 A JPS6432765 A JP S6432765A JP 62187504 A JP62187504 A JP 62187504A JP 18750487 A JP18750487 A JP 18750487A JP S6432765 A JPS6432765 A JP S6432765A
Authority
JP
Japan
Prior art keywords
binarizing
dither
outputted
error
signal
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
JP62187504A
Other languages
Japanese (ja)
Inventor
Toshiaki Nakamura
Mitsuharu Tadauchi
Munetoshi Unuma
Masahito Kobayashi
Noboru Suemori
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62187504A priority Critical patent/JPS6432765A/en
Publication of JPS6432765A publication Critical patent/JPS6432765A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To execute a pseudo half tone binarizing processing by means of a simple binarizing processing and a dither method by providing a dither matrix memory and a binarizing mode setting means in an image binarizing device to execute the pseudo half tone binarizing processing by means of an error diffusing method. CONSTITUTION:When a simple binarizing mode is selected, since distribution errors (a)-(d) from an error dispersing memory 22 all output '0' due to an error table RAM enable signal (g), an error dispersion is not executed. The threshold for the simple binarizing is outputted to a binarizing slice level (f) by a dither matrix selecting signal (h) from a mode setting register 24, and a simple binarizing signal (k) is outputted. When the binarizing mode of the dither method is selected, since the threshold for the dither corresponding to each picture element is outputted to the binarizing slice level (f) of a dither matrix memory 23, the binarizing signal of the dither (k) is outputted. Consequently, based on the binarizing circuit constitution for the error dispersion, the functions of simple binarizing and the binarizing of the dither method can be also realized.
JP62187504A 1987-07-29 1987-07-29 Image binarization device Pending JPS6432765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62187504A JPS6432765A (en) 1987-07-29 1987-07-29 Image binarization device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62187504A JPS6432765A (en) 1987-07-29 1987-07-29 Image binarization device

Publications (1)

Publication Number Publication Date
JPS6432765A true JPS6432765A (en) 1989-02-02

Family

ID=16207220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62187504A Pending JPS6432765A (en) 1987-07-29 1987-07-29 Image binarization device

Country Status (1)

Country Link
JP (1) JPS6432765A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02193462A (en) * 1989-01-21 1990-07-31 Ricoh Co Ltd Digital copying machine
JPH03149966A (en) * 1989-11-07 1991-06-26 Oki Electric Ind Co Ltd Image processing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02193462A (en) * 1989-01-21 1990-07-31 Ricoh Co Ltd Digital copying machine
JPH03149966A (en) * 1989-11-07 1991-06-26 Oki Electric Ind Co Ltd Image processing method

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