JPS57119562A - Binary-coded gradation processing method for analog picture signal - Google Patents

Binary-coded gradation processing method for analog picture signal

Info

Publication number
JPS57119562A
JPS57119562A JP56006062A JP606281A JPS57119562A JP S57119562 A JPS57119562 A JP S57119562A JP 56006062 A JP56006062 A JP 56006062A JP 606281 A JP606281 A JP 606281A JP S57119562 A JPS57119562 A JP S57119562A
Authority
JP
Japan
Prior art keywords
binary
gradation processing
picture signal
processing
analog 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.)
Granted
Application number
JP56006062A
Other languages
Japanese (ja)
Other versions
JPH0456508B2 (en
Inventor
Katsuhiro Watai
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 JP56006062A priority Critical patent/JPS57119562A/en
Publication of JPS57119562A publication Critical patent/JPS57119562A/en
Publication of JPH0456508B2 publication Critical patent/JPH0456508B2/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
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Character Input (AREA)

Abstract

PURPOSE:To select a light shade difference by binary-coded gradation processing by giving groups different rates of variation in high and low array of threshold levels for the binary-coded gradation processing, and performing the processing in accordance with the specification of gradation expression. CONSTITUTION:Comparison level data for the gradation processing of an analog picture signal are arrayed in two dimensions of bits in a main scanning direction and bits in a subordinate scanning direction Y, and groups which correspond to density indication signals are stored in an ROMDMD2. Each group of data has a different rate of variation in high and low array of threshold levels like 2a-2c, and the maximum value and minimum value are equalized in respective groups and set to four four-by-four matrix areas of each group 4c. Address data from a picture-element address specifying circuit ACC and an address switching circuit DMD are used to read comparison level data, which correspond to density specification signals 1-3, from the DMD2, and they are processed by A/D conversion and compared with the analog picture signal to perform binary-coding processing with a light and shade difference which corresponds to an original.
JP56006062A 1981-01-19 1981-01-19 Binary-coded gradation processing method for analog picture signal Granted JPS57119562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56006062A JPS57119562A (en) 1981-01-19 1981-01-19 Binary-coded gradation processing method for analog picture signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56006062A JPS57119562A (en) 1981-01-19 1981-01-19 Binary-coded gradation processing method for analog picture signal

Publications (2)

Publication Number Publication Date
JPS57119562A true JPS57119562A (en) 1982-07-26
JPH0456508B2 JPH0456508B2 (en) 1992-09-08

Family

ID=11628095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56006062A Granted JPS57119562A (en) 1981-01-19 1981-01-19 Binary-coded gradation processing method for analog picture signal

Country Status (1)

Country Link
JP (1) JPS57119562A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160267A (en) * 1981-03-30 1982-10-02 Canon Inc Picture processor
DE3346316A1 (en) * 1982-12-27 1984-07-12 Kabushiki Kaisha Sakata Shokai, Osaka METHOD AND DEVICE FOR GENERATING GRID IMAGES
JPS6229369A (en) * 1985-07-30 1987-02-07 Canon Inc Picture binarization circuit
JPS6229370A (en) * 1985-07-30 1987-02-07 Canon Inc Picture reader
JPS62188470A (en) * 1986-02-13 1987-08-18 Toshiba Corp Picture signal processor
JPS62263770A (en) * 1986-05-09 1987-11-16 Ricoh Co Ltd Color recorder
JPS6423680A (en) * 1987-07-17 1989-01-26 Nippon Seimitsu Kogyo Image input device
JPS6423681A (en) * 1987-07-17 1989-01-26 Nippon Seimitsu Kogyo Image input device
JPH04151974A (en) * 1990-05-25 1992-05-25 Mitsubishi Electric Corp Printer
US20180035009A1 (en) * 2016-07-29 2018-02-01 Funai Electric Co., Ltd. Image processing apparatus and method of generating binarized image

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580958A (en) * 1978-12-15 1980-06-18 Toshiba Corp Picture signal binary coding system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580958A (en) * 1978-12-15 1980-06-18 Toshiba Corp Picture signal binary coding system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160267A (en) * 1981-03-30 1982-10-02 Canon Inc Picture processor
DE3346316A1 (en) * 1982-12-27 1984-07-12 Kabushiki Kaisha Sakata Shokai, Osaka METHOD AND DEVICE FOR GENERATING GRID IMAGES
US4556918A (en) * 1982-12-27 1985-12-03 Kabushiki Kaisha Sakata Shokai Method and apparatus for generating screened halftone images
JPS6229369A (en) * 1985-07-30 1987-02-07 Canon Inc Picture binarization circuit
JPS6229370A (en) * 1985-07-30 1987-02-07 Canon Inc Picture reader
JPS62188470A (en) * 1986-02-13 1987-08-18 Toshiba Corp Picture signal processor
JPS62263770A (en) * 1986-05-09 1987-11-16 Ricoh Co Ltd Color recorder
JPH06101797B2 (en) * 1986-05-09 1994-12-12 株式会社リコー Color recording device
JPS6423680A (en) * 1987-07-17 1989-01-26 Nippon Seimitsu Kogyo Image input device
JPS6423681A (en) * 1987-07-17 1989-01-26 Nippon Seimitsu Kogyo Image input device
JPH04151974A (en) * 1990-05-25 1992-05-25 Mitsubishi Electric Corp Printer
US20180035009A1 (en) * 2016-07-29 2018-02-01 Funai Electric Co., Ltd. Image processing apparatus and method of generating binarized image
US10412264B2 (en) * 2016-07-29 2019-09-10 Funai Electric Co., Ltd. Image processing apparatus and method for generating a binary image with areas having different ratios of change in gradation formed by different dot patterns alternatingly disposed

Also Published As

Publication number Publication date
JPH0456508B2 (en) 1992-09-08

Similar Documents

Publication Publication Date Title
US4531160A (en) Display processor system and method
US3294896A (en) Digital encoder for facsimile transmission
US4485408A (en) Halftone processing method for digital facsmile apparatus
GB2103449A (en) Method and apparatus for gray level signal processing
GB1595003A (en) Apparatus for and methods of copying documents
JPS6198069A (en) Image processor
JPS57119562A (en) Binary-coded gradation processing method for analog picture signal
US4366507A (en) Shaded picture signal processing system and method
JPS6123468A (en) Picture processor
DE69112865D1 (en) Processing method of digital control data associated with an HD-MAC video signal.
US4827353A (en) Method of and circuit arrangement for changing the resolution of binary pseudo-halftone pictures
US3715475A (en) Method and apparatus for electrically transmitting pictures
US4217574A (en) Analog to digital converter having nonlinear amplitude transformation
ATE208516T1 (en) CLASSIFICATION SYSTEM AND METHODS USING N-TUPLE OR RAM-BASED NEURONAL NETWORK
EP0735741A3 (en) Method and system for converting multi-gradated image data into binary image data
GB2029169A (en) Facsimile communication system
JPS5941969A (en) Gradational image recording and processing system
JPS56144666A (en) Processing method of color picture information
JPS6079480A (en) Picture signal discriminating circuit
JPS57129064A (en) Picture signal processing system
WO1991009489A3 (en) Mixed matrix image processing for rendering halftone images with variable dot sizes
JPS57119561A (en) Binary-coding processing method for analog picture signal
SU1228300A1 (en) Digital aperture corrector
JPH0223067B2 (en)
JPS56166665A (en) Half-tone processing system