JPS5727376A - Setting method for binary-coded threshold level - Google Patents

Setting method for binary-coded threshold level

Info

Publication number
JPS5727376A
JPS5727376A JP10180080A JP10180080A JPS5727376A JP S5727376 A JPS5727376 A JP S5727376A JP 10180080 A JP10180080 A JP 10180080A JP 10180080 A JP10180080 A JP 10180080A JP S5727376 A JPS5727376 A JP S5727376A
Authority
JP
Japan
Prior art keywords
level
density
binary
threshould
area
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
JP10180080A
Other languages
Japanese (ja)
Inventor
Akira Sakurai
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 JP10180080A priority Critical patent/JPS5727376A/en
Publication of JPS5727376A publication Critical patent/JPS5727376A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/16—Image preprocessing
    • G06V30/162—Quantising the image signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Character Input (AREA)

Abstract

PURPOSE:To obtain an excellent binary-coded picture without reference to whether the texture level of a character picture is high or low, by setting the best threshould level by utilizing an area, which corresponds to density, as data. CONSTITUTION:When three-line density information is stored in a cyclic register 6 through a shift register part 1, a binary-coding part 3 sets temporary threshold levels for respective density level and then finds binary-coded picture to find an area-number ratio 2. This picture is scanned over the entire picture by the cyclic register and a frequency is counted in the internal memory of a threshould- level arithmetic part 4 from some area-number ratio. Once the area-number ratio which corresponds to one density level is found, the threshould level for the binary- coding part 3 is varied to repeat the same operation for each density level, thus obtaining the distribution state of the density. In this way, a threshould-level arithmetic part 4 finds the frequency distribution of the area-number ratio to the density lastly, thereby setting the best threshould level.
JP10180080A 1980-07-24 1980-07-24 Setting method for binary-coded threshold level Pending JPS5727376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10180080A JPS5727376A (en) 1980-07-24 1980-07-24 Setting method for binary-coded threshold level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10180080A JPS5727376A (en) 1980-07-24 1980-07-24 Setting method for binary-coded threshold level

Publications (1)

Publication Number Publication Date
JPS5727376A true JPS5727376A (en) 1982-02-13

Family

ID=14310213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10180080A Pending JPS5727376A (en) 1980-07-24 1980-07-24 Setting method for binary-coded threshold level

Country Status (1)

Country Link
JP (1) JPS5727376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115182A (en) * 1984-11-10 1986-06-02 Nec Corp Graphic quantization device
DE3636299A1 (en) * 1985-10-24 1987-04-30 Hitachi Ltd METHOD FOR BINARY ENCODING AND BINARY ENCODER CIRCUIT FOR VIDEO SIGNALS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115182A (en) * 1984-11-10 1986-06-02 Nec Corp Graphic quantization device
DE3636299A1 (en) * 1985-10-24 1987-04-30 Hitachi Ltd METHOD FOR BINARY ENCODING AND BINARY ENCODER CIRCUIT FOR VIDEO SIGNALS

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