JPS5671375A - Video information coding system - Google Patents

Video information coding system

Info

Publication number
JPS5671375A
JPS5671375A JP14766079A JP14766079A JPS5671375A JP S5671375 A JPS5671375 A JP S5671375A JP 14766079 A JP14766079 A JP 14766079A JP 14766079 A JP14766079 A JP 14766079A JP S5671375 A JPS5671375 A JP S5671375A
Authority
JP
Japan
Prior art keywords
level
tone
quantized
video signal
coding
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
JP14766079A
Other languages
Japanese (ja)
Inventor
Kunihiko Sekiya
Katsuhiko Kuma
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14766079A priority Critical patent/JPS5671375A/en
Publication of JPS5671375A publication Critical patent/JPS5671375A/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
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To increase the efficiency of coding and to make the capacity of storage device small, by automatically discriminating the two-tone expressing region in mixed documents and multitone expressing region for the different tone expressing region, and selecting the coding processing system corresponding to them. CONSTITUTION:A mixed document 1 is radiated with a light source 3, the reflected light is received with an image sensor 4, and the information of each scanning line is picked up as an analog signal 11. This picked up signal 11 is quantized to predetermined tone number N(N>=3) at an A/D converter 5. The video signal 12 quantized at the converter 5 is sequentially stored on the scanning line memory 6. Further, the video signal 12 is fed to a level counter 7, where the number of times of appearance of each level at tone number N level or a part of specific level is counted to discriminate the level value of each video element at a coding level number discriminator 8. Further, the video signal quantized is selected at the output of the discriminator 8 for the number of tone M(M>=2) of the coder 9 to be coded, and it is coded based on the value and stored in the storage device 10 to make the capacity small.
JP14766079A 1979-11-16 1979-11-16 Video information coding system Pending JPS5671375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14766079A JPS5671375A (en) 1979-11-16 1979-11-16 Video information coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14766079A JPS5671375A (en) 1979-11-16 1979-11-16 Video information coding system

Publications (1)

Publication Number Publication Date
JPS5671375A true JPS5671375A (en) 1981-06-13

Family

ID=15435379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14766079A Pending JPS5671375A (en) 1979-11-16 1979-11-16 Video information coding system

Country Status (1)

Country Link
JP (1) JPS5671375A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224319A1 (en) * 1981-06-29 1983-01-13 Nippon Telegraph & Telephone Public Corp., Tokyo METHOD AND DEVICE FOR DETERMINING AN IMAGE AREA
JPS621373A (en) * 1985-06-27 1987-01-07 Toshiba Corp Picture encoding system
JPH01256276A (en) * 1988-04-06 1989-10-12 Canon Inc Picture reader
JP2018088606A (en) * 2016-11-28 2018-06-07 キヤノン株式会社 Image processing device, image forming device, image processing method, and program

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299720A (en) * 1976-02-18 1977-08-22 Toshiba Corp Method of converting analogous image signal to binary value
JPS5374827A (en) * 1976-12-15 1978-07-03 Matsushita Electric Ind Co Ltd Information transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299720A (en) * 1976-02-18 1977-08-22 Toshiba Corp Method of converting analogous image signal to binary value
JPS5374827A (en) * 1976-12-15 1978-07-03 Matsushita Electric Ind Co Ltd Information transmission system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224319A1 (en) * 1981-06-29 1983-01-13 Nippon Telegraph & Telephone Public Corp., Tokyo METHOD AND DEVICE FOR DETERMINING AN IMAGE AREA
JPS621373A (en) * 1985-06-27 1987-01-07 Toshiba Corp Picture encoding system
JPH01256276A (en) * 1988-04-06 1989-10-12 Canon Inc Picture reader
JP2018088606A (en) * 2016-11-28 2018-06-07 キヤノン株式会社 Image processing device, image forming device, image processing method, and program

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