JPS57129064A - Picture signal processing system - Google Patents

Picture signal processing system

Info

Publication number
JPS57129064A
JPS57129064A JP56014785A JP1478581A JPS57129064A JP S57129064 A JPS57129064 A JP S57129064A JP 56014785 A JP56014785 A JP 56014785A JP 1478581 A JP1478581 A JP 1478581A JP S57129064 A JPS57129064 A JP S57129064A
Authority
JP
Japan
Prior art keywords
picture signal
picture
block
rom5
low density
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
JP56014785A
Other languages
Japanese (ja)
Inventor
Koichi Kohitsu
Mitsuo Togashi
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.)
MATSUSHITA DENSOU KIKI KK
Panasonic System Solutions Japan Co Ltd
Original Assignee
MATSUSHITA DENSOU KIKI KK
Matsushita Graphic Communication Systems 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 MATSUSHITA DENSOU KIKI KK, Matsushita Graphic Communication Systems Inc filed Critical MATSUSHITA DENSOU KIKI KK
Priority to JP56014785A priority Critical patent/JPS57129064A/en
Publication of JPS57129064A publication Critical patent/JPS57129064A/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
    • H04N1/40068—Modification of image resolution, i.e. determining the values of picture elements at new relative positions

Abstract

PURPOSE:To reduce deterioration of a picture quality in case of sending out a picture signal whose picture element density is rough, by dividing a basic picture signal into each block in the main scanning direction and the subscanning direction, and converting each block to one bit of a low density picture signal. CONSTITUTION:A binary picture signal is stored in addresses A1-A8 of an ROM5 through D.FFs1-4, is divided into each block of M bits in the main scanning direction and N bits in the subscanning direction, contents corresponding to the address inputs A1-A8 in the picture signal conversion table written in advance in the ROM5 are read out from said ROM5, and are outputted as a low density picture signal (b) to a picture signal output terminal 6. Subsequently, said each block is converted to one bit of the low density picture signal. In this way, a picture information is read in detail, a basic picture signal obtained from said information is divided into blocks, they are coverted in accordance with a distribution pattern of a signal level, therefore,deterioration of a picture quality is more reduced than usual.
JP56014785A 1981-02-02 1981-02-02 Picture signal processing system Pending JPS57129064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56014785A JPS57129064A (en) 1981-02-02 1981-02-02 Picture signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56014785A JPS57129064A (en) 1981-02-02 1981-02-02 Picture signal processing system

Publications (1)

Publication Number Publication Date
JPS57129064A true JPS57129064A (en) 1982-08-10

Family

ID=11870703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56014785A Pending JPS57129064A (en) 1981-02-02 1981-02-02 Picture signal processing system

Country Status (1)

Country Link
JP (1) JPS57129064A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02268072A (en) * 1989-04-10 1990-11-01 Canon Inc Picture reducing device
JPH02288668A (en) * 1989-04-28 1990-11-28 Mitsubishi Electric Corp Picture element density conversion processor
JPH06205226A (en) * 1993-06-18 1994-07-22 Hitachi Ltd Information storage system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138356A (en) * 1980-03-31 1981-10-28 Fujitsu Ltd Picture shrinking system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138356A (en) * 1980-03-31 1981-10-28 Fujitsu Ltd Picture shrinking system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02268072A (en) * 1989-04-10 1990-11-01 Canon Inc Picture reducing device
JPH02288668A (en) * 1989-04-28 1990-11-28 Mitsubishi Electric Corp Picture element density conversion processor
JPH06205226A (en) * 1993-06-18 1994-07-22 Hitachi Ltd Information storage system
JPH0815297B2 (en) * 1993-06-18 1996-02-14 株式会社日立製作所 Information storage and transfer system

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