JPS5741073A - Picture information encoding device - Google Patents

Picture information encoding device

Info

Publication number
JPS5741073A
JPS5741073A JP55115656A JP11565680A JPS5741073A JP S5741073 A JPS5741073 A JP S5741073A JP 55115656 A JP55115656 A JP 55115656A JP 11565680 A JP11565680 A JP 11565680A JP S5741073 A JPS5741073 A JP S5741073A
Authority
JP
Japan
Prior art keywords
white
black
output
picture data
input picture
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
JP55115656A
Other languages
Japanese (ja)
Inventor
Toshiaki Yamada
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55115656A priority Critical patent/JPS5741073A/en
Publication of JPS5741073A publication Critical patent/JPS5741073A/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
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures

Landscapes

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

Abstract

PURPOSE:To obtain a satisfactory output picture even in case encoding is unable to follow a high speed read of a scanner, by detecting the number of variation points of white and black at every scanning line, and converting a pattern in accordance with its result. CONSTITUTION:When it is detected by an AND circuit 19 that 1/2 of the number of variation points of white and black in an input picture data becomes an output of a counter 18, and the output of said counter 18 has attained to a prescribed value corresponding to 1 scanning line portion, a flip-flop 20 is set. As a result, an AND circuit 21 is cut off, and after that, an input picture data is all made white and is provided to an input data buffer circuit. Accordingly, in case of the line having a lot of variation points of white and black, a part of input picture data is made white forcibly, and is converted to a pattern which can be encoded within a prescribed time.
JP55115656A 1980-08-22 1980-08-22 Picture information encoding device Pending JPS5741073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55115656A JPS5741073A (en) 1980-08-22 1980-08-22 Picture information encoding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55115656A JPS5741073A (en) 1980-08-22 1980-08-22 Picture information encoding device

Publications (1)

Publication Number Publication Date
JPS5741073A true JPS5741073A (en) 1982-03-06

Family

ID=14668038

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55115656A Pending JPS5741073A (en) 1980-08-22 1980-08-22 Picture information encoding device

Country Status (1)

Country Link
JP (1) JPS5741073A (en)

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