JPS6444751A - Image recorder - Google Patents

Image recorder

Info

Publication number
JPS6444751A
JPS6444751A JP62200981A JP20098187A JPS6444751A JP S6444751 A JPS6444751 A JP S6444751A JP 62200981 A JP62200981 A JP 62200981A JP 20098187 A JP20098187 A JP 20098187A JP S6444751 A JPS6444751 A JP S6444751A
Authority
JP
Japan
Prior art keywords
density
circuit
signal
data
converted
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.)
Granted
Application number
JP62200981A
Other languages
Japanese (ja)
Other versions
JP2617944B2 (en
Inventor
Yoshiro Udagawa
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62200981A priority Critical patent/JP2617944B2/en
Publication of JPS6444751A publication Critical patent/JPS6444751A/en
Application granted granted Critical
Publication of JP2617944B2 publication Critical patent/JP2617944B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color, Gradation (AREA)
  • Image Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To obtain an image recorder capable of properly correcting a change in response frequency made by recording dots, by applying different filtering processings to a low density value and a high density value. CONSTITUTION:R, G, B data read by a line memory 6 is converted to a signal for density data of C, M Y by a gradation conversion circuit 7. Next, in the C, M, Y density signal the asymmetric color content of an ink in use is corrected by a masking circuit 8. This circuit 8 is executed using a table conversion ROM, which inputs the C, M, Y density signal and outputs a C', M', Y' arithmetic signal. The C', M', Y' data obtained in this manner is inputted to a highlight dither circuit 9. In this circuit 9, a dither processing is applied to represent a gradation range from a minimum density representable with minimum dots to a density 0. The C', M', Y' density data obtained in this manner is converted to voltage data for driving a head by a density-voltage conversion circuit 10.
JP62200981A 1987-08-13 1987-08-13 Image recording device Expired - Fee Related JP2617944B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200981A JP2617944B2 (en) 1987-08-13 1987-08-13 Image recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200981A JP2617944B2 (en) 1987-08-13 1987-08-13 Image recording device

Publications (2)

Publication Number Publication Date
JPS6444751A true JPS6444751A (en) 1989-02-17
JP2617944B2 JP2617944B2 (en) 1997-06-11

Family

ID=16433530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200981A Expired - Fee Related JP2617944B2 (en) 1987-08-13 1987-08-13 Image recording device

Country Status (1)

Country Link
JP (1) JP2617944B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04271570A (en) * 1990-09-27 1992-09-28 Samsung Electron Co Ltd Contour correction circuit for image
JPH0911551A (en) * 1995-06-28 1997-01-14 Nec Corp Printer
JP2007144868A (en) * 2005-11-29 2007-06-14 Seiko Epson Corp Inkjet printer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04271570A (en) * 1990-09-27 1992-09-28 Samsung Electron Co Ltd Contour correction circuit for image
JPH0911551A (en) * 1995-06-28 1997-01-14 Nec Corp Printer
JP2007144868A (en) * 2005-11-29 2007-06-14 Seiko Epson Corp Inkjet printer

Also Published As

Publication number Publication date
JP2617944B2 (en) 1997-06-11

Similar Documents

Publication Publication Date Title
CA1222160A (en) Modified color removal dependent on tone
US3904816A (en) Method for the dot-by-dot and line-by-line reproduction of picture originals
US4551751A (en) Color reduction dependent on tone
JPS6485631A (en) Electronic endoscopic apparatus
EP0054313A2 (en) Colour image duplicating device and method
DE3372140D1 (en) Method of and device for making colour separations in single colour printing
KR920013198A (en) Color Corrector of Color Printer
JPS5569482A (en) Picture recording device
JPS6444751A (en) Image recorder
EP0219989A2 (en) Color hard copy system
JPH084320B2 (en) Color image forming apparatus
JPS55142342A (en) Digital color tone control method
JPS56140350A (en) Method and device for removing under color
JPS6455248A (en) Ink jet recorder
JP2614620B2 (en) Color processing method
JP2527715B2 (en) Image processing method
JPS6482960A (en) Ink jet recorder
JPS572774A (en) Recording system for gradation image
JPS5764565A (en) Digital color pinter
JPS6444171A (en) Picture signal processor
JPS55102966A (en) Half-tone reproduction circuit for facsimile or the like
JPS57119565A (en) Picture-signal correction system
JPS5713855A (en) Polychromatic ink jet recorder
JPS572163A (en) Multicolor ink jet recording device
JPS57156265A (en) Ink jet printing device

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees