JPS57108857A - Graphic art device for television picture - Google Patents

Graphic art device for television picture

Info

Publication number
JPS57108857A
JPS57108857A JP18448180A JP18448180A JPS57108857A JP S57108857 A JPS57108857 A JP S57108857A JP 18448180 A JP18448180 A JP 18448180A JP 18448180 A JP18448180 A JP 18448180A JP S57108857 A JPS57108857 A JP S57108857A
Authority
JP
Japan
Prior art keywords
graphic art
lpf23
lpf
scanner
input
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
JP18448180A
Other languages
Japanese (ja)
Inventor
Senhiko Yamada
Toshiji Fujita
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.)
Toppan Inc
Original Assignee
Toppan Printing 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 Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP18448180A priority Critical patent/JPS57108857A/en
Publication of JPS57108857A publication Critical patent/JPS57108857A/en
Pending 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)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Color Television Systems (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To improve the quality of a graphic art image and to recover the deterioration of the picture in the form of moire or mosic and S/N ratio by passing a LPF a signal read out of memory to be input to a scanner through an LPF. CONSTITUTION:A slow signal to be input to a scanner is passed through a variable low pass filter 23. Its cutoff frequency is controlled interlocking with a magnification setting circuit 22. Of which reason is that the clock frequency of a read pulse train is different depending upon the intensity of the light to which the film is exposed. The variable LPF23 is an active filter using an operational amplifier, which is set up with C and R without using L, so that the cutoff frequency of said LPF23 is determined at an optimum value.
JP18448180A 1980-12-25 1980-12-25 Graphic art device for television picture Pending JPS57108857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18448180A JPS57108857A (en) 1980-12-25 1980-12-25 Graphic art device for television picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18448180A JPS57108857A (en) 1980-12-25 1980-12-25 Graphic art device for television picture

Publications (1)

Publication Number Publication Date
JPS57108857A true JPS57108857A (en) 1982-07-07

Family

ID=16153917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18448180A Pending JPS57108857A (en) 1980-12-25 1980-12-25 Graphic art device for television picture

Country Status (1)

Country Link
JP (1) JPS57108857A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190084A (en) * 1984-03-09 1985-09-27 Hitachi Medical Corp Picture recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190084A (en) * 1984-03-09 1985-09-27 Hitachi Medical Corp Picture recorder

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