JPS54144139A - Processing system for intermediate tone - Google Patents

Processing system for intermediate tone

Info

Publication number
JPS54144139A
JPS54144139A JP5291178A JP5291178A JPS54144139A JP S54144139 A JPS54144139 A JP S54144139A JP 5291178 A JP5291178 A JP 5291178A JP 5291178 A JP5291178 A JP 5291178A JP S54144139 A JPS54144139 A JP S54144139A
Authority
JP
Japan
Prior art keywords
picture element
error
adder
fed
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
JP5291178A
Other languages
Japanese (ja)
Inventor
Keiji Sekikawa
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 JP5291178A priority Critical patent/JPS54144139A/en
Publication of JPS54144139A publication Critical patent/JPS54144139A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To make easy to see for the reproduced picture, by reducing the repetitive production of the same pattern which is an obstacle, without lowering the resolution of the reproduced picture, when the picture element in which picture element concentration level for input picture element is constant, is continuous.
CONSTITUTION: The input picture element DIN from the scanner including the intermediate tone is inputted to the normalizing unit 30, it is separated into matrix shape, and fed to the adder 31 as the normalized value Xij. Further, after adding the normalized value Xij and the accumulated error eij at the adder 31, it is compared with the comparator 32 with the dither pattern Dkl of the threshold pattern prepared in advance, and the picture element output Yij=1 or Yij=0 is outputted with the result. Further, the picture element output(Yij=1 or 0) is given to the error dispersion unit 33, the error R is calculated based on the total concentration value Xij fed from the adder 31, the value dividing the content of the dispersion unit 33 with the dispersion coefficient is added, the accumulative error εij is fed to the adder 31. and the error E is dispersed to the dots at surrounding to make easy to see the reproducing picture.
COPYRIGHT: (C)1979,JPO&Japio
JP5291178A 1978-05-01 1978-05-01 Processing system for intermediate tone Pending JPS54144139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5291178A JPS54144139A (en) 1978-05-01 1978-05-01 Processing system for intermediate tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5291178A JPS54144139A (en) 1978-05-01 1978-05-01 Processing system for intermediate tone

Publications (1)

Publication Number Publication Date
JPS54144139A true JPS54144139A (en) 1979-11-10

Family

ID=12928006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5291178A Pending JPS54144139A (en) 1978-05-01 1978-05-01 Processing system for intermediate tone

Country Status (1)

Country Link
JP (1) JPS54144139A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967560A (en) * 1982-10-08 1984-04-17 Canon Inc Color picture recording device
JPS6074772A (en) * 1983-09-29 1985-04-27 Matsushita Electric Ind Co Ltd Quantizing method of multi-value picture information
JPS62239666A (en) * 1986-04-10 1987-10-20 Seiko Epson Corp Binarization processor
JPS62239667A (en) * 1986-04-10 1987-10-20 Seiko Epson Corp Picture processor
JPS63155955A (en) * 1986-12-19 1988-06-29 Matsushita Electric Ind Co Ltd Picture signal processor
JPH01256870A (en) * 1988-04-06 1989-10-13 Brother Ind Ltd Half-tone image reproducing method
JPH0222960A (en) * 1988-07-12 1990-01-25 Brother Ind Ltd Image expressing method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967560A (en) * 1982-10-08 1984-04-17 Canon Inc Color picture recording device
JPS6074772A (en) * 1983-09-29 1985-04-27 Matsushita Electric Ind Co Ltd Quantizing method of multi-value picture information
JPH0126591B2 (en) * 1983-09-29 1989-05-24 Matsushita Electric Ind Co Ltd
JPS62239666A (en) * 1986-04-10 1987-10-20 Seiko Epson Corp Binarization processor
JPS62239667A (en) * 1986-04-10 1987-10-20 Seiko Epson Corp Picture processor
JPS63155955A (en) * 1986-12-19 1988-06-29 Matsushita Electric Ind Co Ltd Picture signal processor
JPH01256870A (en) * 1988-04-06 1989-10-13 Brother Ind Ltd Half-tone image reproducing method
JPH0222960A (en) * 1988-07-12 1990-01-25 Brother Ind Ltd Image expressing method

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