JPS5728474A - Picture processing system - Google Patents

Picture processing system

Info

Publication number
JPS5728474A
JPS5728474A JP10325880A JP10325880A JPS5728474A JP S5728474 A JPS5728474 A JP S5728474A JP 10325880 A JP10325880 A JP 10325880A JP 10325880 A JP10325880 A JP 10325880A JP S5728474 A JPS5728474 A JP S5728474A
Authority
JP
Japan
Prior art keywords
circuit
differences
density
maximum value
sum
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
JP10325880A
Other languages
Japanese (ja)
Inventor
Hirokawa Hayashi
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 JP10325880A priority Critical patent/JPS5728474A/en
Publication of JPS5728474A publication Critical patent/JPS5728474A/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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Abstract

PURPOSE:To avoid the missing of required picture information and remained noise component, by setting optimum threshold level at all times regardless of the state of background of an original. CONSTITUTION:A picture information in a specific picture element region is temporarily stored in a multi-information storage circuit 1. The maximum value and the average value of the stored content are detected at each level detection circuit 2, 3, and the difference is calculated at a subtractor 4. At the same time, the content of the circuit 1 is transmitted to an operation circuit 5, where the sum of differences at specific picture element regions is sequentially calculated, the result of calculation is given to a storage circuit 6 of sum of differences on density, and it is added and stored in a register section on each density respectively to obtain the total sum of differences on density. A maximum value detection circuit 7 detects the maximum value of the total sum of differences on density. An operation circuit 8 calculates an optimum threshold level based on the output and it is given to a binary circuit 9.
JP10325880A 1980-07-28 1980-07-28 Picture processing system Pending JPS5728474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10325880A JPS5728474A (en) 1980-07-28 1980-07-28 Picture processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10325880A JPS5728474A (en) 1980-07-28 1980-07-28 Picture processing system

Publications (1)

Publication Number Publication Date
JPS5728474A true JPS5728474A (en) 1982-02-16

Family

ID=14349410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10325880A Pending JPS5728474A (en) 1980-07-28 1980-07-28 Picture processing system

Country Status (1)

Country Link
JP (1) JPS5728474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160363A2 (en) * 1984-04-28 1985-11-06 Kabushiki Kaisha Toshiba Binarizing system of picture image signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160363A2 (en) * 1984-04-28 1985-11-06 Kabushiki Kaisha Toshiba Binarizing system of picture image signals

Similar Documents

Publication Publication Date Title
JPS57207958A (en) Data correcting device
JPS57137978A (en) Pattern detecting device
JPS5728474A (en) Picture processing system
JPS5580958A (en) Picture signal binary coding system
JPS6427380A (en) Inter-frame coding system
ES8201745A1 (en) Conditional instruction execution in a pipelined processor
JPS57174776A (en) Threshold device
JPS5728475A (en) Picture processing system
JPS5526704A (en) Two-dimentional sequential coding system
JPS5748154A (en) Picture processing system
JPS57181270A (en) Encoding system for binary picture signal
JPS55121544A (en) Multiplication rounding circuit
JPS56138378A (en) Binary device for picture
JPS57184331A (en) Noise eliminating device
JPS5731262A (en) Picture processing system
JPS5512538A (en) Detection method for stylus skip
JPS57104363A (en) Frame pattern discriminating method
JPS56140598A (en) Error control system of memory device
JPS5723369A (en) Video cipher processing system
JPS5636761A (en) Drawing system
JPS5752289A (en) Multifrequency signal receiver
JPS5372560A (en) Binary coded circuit
JPS561660A (en) Reading method
JPS56168284A (en) Mark reading system
JPS5760788A (en) Video binary coding system