JPS5580956A - Picture signal coding system - Google Patents

Picture signal coding system

Info

Publication number
JPS5580956A
JPS5580956A JP15551678A JP15551678A JPS5580956A JP S5580956 A JPS5580956 A JP S5580956A JP 15551678 A JP15551678 A JP 15551678A JP 15551678 A JP15551678 A JP 15551678A JP S5580956 A JPS5580956 A JP S5580956A
Authority
JP
Japan
Prior art keywords
picture
gradation level
coding
gradation
pattern
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
JP15551678A
Other languages
Japanese (ja)
Inventor
Toru Kaneko
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15551678A priority Critical patent/JPS5580956A/en
Publication of JPS5580956A publication Critical patent/JPS5580956A/en
Pending legal-status Critical Current

Links

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  • Image Processing (AREA)

Abstract

PURPOSE: To secure the coding to ensure the reproduction of a high-quality picture by giving the gradation properties to the picture, the quality of which was so far deteriorated through coding in the form of the binary picture, with addition of a small number of bits.
CONSTITUTION: In case the shadow pattern is coded, the pattern is coded in the form of the binary picture of under gradation level 1 and over gradation level 2 each. With decision of the binary picture, the positions are decided in a single meaning way for both the inside and outside points of white/black border line 11. Thus, for instance, the coding is given in sequence from the upper left, for example, of the pattern to the gradation information about only those outside and inside points. At the same time, whether the gradation level at outside point 11 is 0 or 1 as well as the gradation level at inside point 13 is 2 or 3 are shown with one bit each.
COPYRIGHT: (C)1980,JPO&Japio
JP15551678A 1978-12-13 1978-12-13 Picture signal coding system Pending JPS5580956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15551678A JPS5580956A (en) 1978-12-13 1978-12-13 Picture signal coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15551678A JPS5580956A (en) 1978-12-13 1978-12-13 Picture signal coding system

Publications (1)

Publication Number Publication Date
JPS5580956A true JPS5580956A (en) 1980-06-18

Family

ID=15607755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15551678A Pending JPS5580956A (en) 1978-12-13 1978-12-13 Picture signal coding system

Country Status (1)

Country Link
JP (1) JPS5580956A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857158U (en) * 1981-10-13 1983-04-18 三洋電機株式会社 facsimile signal recording device
JPS6020277A (en) * 1983-07-15 1985-02-01 Fujitsu Ltd Multiple tone wedge data compression system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117511A (en) * 1976-03-30 1977-10-03 Canon Inc Picture recording method and its equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117511A (en) * 1976-03-30 1977-10-03 Canon Inc Picture recording method and its equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857158U (en) * 1981-10-13 1983-04-18 三洋電機株式会社 facsimile signal recording device
JPH0224301Y2 (en) * 1981-10-13 1990-07-03
JPS6020277A (en) * 1983-07-15 1985-02-01 Fujitsu Ltd Multiple tone wedge data compression system

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