JPS57145477A - Picture converting system - Google Patents

Picture converting system

Info

Publication number
JPS57145477A
JPS57145477A JP56029938A JP2993881A JPS57145477A JP S57145477 A JPS57145477 A JP S57145477A JP 56029938 A JP56029938 A JP 56029938A JP 2993881 A JP2993881 A JP 2993881A JP S57145477 A JPS57145477 A JP S57145477A
Authority
JP
Japan
Prior art keywords
picture
run length
picture elements
distortion
scans
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
JP56029938A
Other languages
Japanese (ja)
Other versions
JPH045303B2 (en
Inventor
Kozo Nakamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56029938A priority Critical patent/JPS57145477A/en
Publication of JPS57145477A publication Critical patent/JPS57145477A/en
Publication of JPH045303B2 publication Critical patent/JPH045303B2/ja
Granted 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
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • H04N1/393—Enlarging or reducing
    • H04N1/3935—Enlarging or reducing with modification of image resolution, i.e. determining the values of picture elements at new relative positions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Editing Of Facsimile Originals (AREA)

Abstract

PURPOSE:To decrease distortion of a picture, by setting the upper limit of the picture distortion which is caused when the thin line of a run length is transmitted in preference in case the picture elements are reduced and transmitted and decreasing the number of picture elements when the picture distortion exceeds its upper limit. CONSTITUTION:A reader 10 scans an original and converts the information on the original into the white and black binary picture signals. Theseppicture signals are temporarily stored in a line memory 20. A run length calculator 30 scans the memory 20 to calculate the run length, i.e., a continuous number of white and black picture elements. When four picture elements are decreased down to three picture elements to be converted, a picture processor 40 gives a 3/4 multiplication to the run length obtained before a conversion, transmits the integer part in the form of a run length obtained after the conversion and adds the deeimal part to the next run length as a residual. In this case, if the thin line of the run length 1 is continuous, the negative residual increases. Thus a limitation is provided against the increase of the negative residual to reduce the picture distortion.
JP56029938A 1981-03-04 1981-03-04 Picture converting system Granted JPS57145477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56029938A JPS57145477A (en) 1981-03-04 1981-03-04 Picture converting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56029938A JPS57145477A (en) 1981-03-04 1981-03-04 Picture converting system

Publications (2)

Publication Number Publication Date
JPS57145477A true JPS57145477A (en) 1982-09-08
JPH045303B2 JPH045303B2 (en) 1992-01-31

Family

ID=12289927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56029938A Granted JPS57145477A (en) 1981-03-04 1981-03-04 Picture converting system

Country Status (1)

Country Link
JP (1) JPS57145477A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449029A (en) * 1977-09-27 1979-04-18 Nippon Telegr & Teleph Corp <Ntt> Reducing method for character pattern

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449029A (en) * 1977-09-27 1979-04-18 Nippon Telegr & Teleph Corp <Ntt> Reducing method for character pattern

Also Published As

Publication number Publication date
JPH045303B2 (en) 1992-01-31

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