JPS58134746A - Compression system of letter and image data - Google Patents

Compression system of letter and image data

Info

Publication number
JPS58134746A
JPS58134746A JP1688582A JP1688582A JPS58134746A JP S58134746 A JPS58134746 A JP S58134746A JP 1688582 A JP1688582 A JP 1688582A JP 1688582 A JP1688582 A JP 1688582A JP S58134746 A JPS58134746 A JP S58134746A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
border
letter
data
point
block
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
JP1688582A
Inventor
Shinichiro Fukuda
Shigeru Fuse
Hiroyuki Shibata
Masatake Takashima
Original Assignee
Photo Composing Mach Mfg 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/027Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems between relatively movable parts of the vehicle, e.g. between steering wheel and column
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
    • G06K9/46Extraction of features or characteristics of the image
    • G06K9/48Extraction of features or characteristics of the image by coding the contour of the pattern contour related features or features from contour like patterns, e.g. hand-drawn point-sequence
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00Image coding, e.g. from bit-mapped to non bit-mapped
    • G06T9/001Model-based coding, e.g. wire frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41Bandwidth or redundancy reduction
    • H04N1/411Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures

Abstract

PURPOSE: To obtain a compression mode for letter and image data, which is capable of faithly coding and memorizing the smoothness of letter border, by a method in which even specific additional information other than coordinate values of the points provided on the letter border is used as memory data and between any adjacent two points is approximated by three-order curve.
CONSTITUTION: For bit pattern data obtained by dot-decomposing a letter image into a matrix form, a border extraction treatment is applied to obtain the position of borders on X- and Y-coordinates. A point P is set on the border and the border is divided into the sections of single-valued function with X as a variable to obtain each block B properly. Any one block B is further divided into plural segments Si, and in terms of three-order curve passing through the start point Pi(xi, yi) of each segment Si, a constant (σi) corresponding to 1/6 of two-order derived function value at each start point Pi is calculated. The coordinate values (xi, yi)(i=1Wn) of the constant σi and the point Pi are stored as border data corresponding to the block.
COPYRIGHT: (C)1983,JPO&Japio
JP1688582A 1982-02-04 1982-02-04 Compression system of letter and image data Pending JPS58134746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1688582A JPS58134746A (en) 1982-02-04 1982-02-04 Compression system of letter and image data

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1688582A JPS58134746A (en) 1982-02-04 1982-02-04 Compression system of letter and image data
US06463111 US4542412A (en) 1982-02-04 1983-02-01 Method for compressing character or pictorial image data
GB8303086A GB2114851B (en) 1982-02-04 1983-02-04 A method for compressing character or pictorial image data
GB8508057A GB2160384B (en) 1982-02-04 1985-03-28 A method for compressing character or pictorial image data

Publications (1)

Publication Number Publication Date
JPS58134746A true true JPS58134746A (en) 1983-08-11

Family

ID=11928619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1688582A Pending JPS58134746A (en) 1982-02-04 1982-02-04 Compression system of letter and image data

Country Status (2)

Country Link
JP (1) JPS58134746A (en)
GB (1) GB2160384B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60222255A (en) * 1984-02-21 1985-11-06 Hell Rudolf Dr Ing Gmbh Method and device for recording pattern such as character symbol, etc.
JPS6167887A (en) * 1984-09-10 1986-04-08 Allied Corp Method and apparatus for generating signal set indicating curve
JPS6167888A (en) * 1984-09-10 1986-04-08 Allied Corp Method for generating signal set indicating curve
JPS6184684A (en) * 1984-09-10 1986-04-30 Allied Corp Method of generating signal set for plotting curve
JPS63249194A (en) * 1987-04-06 1988-10-17 Canon Kk Image data compression system
JPS63249193A (en) * 1987-04-06 1988-10-17 Canon Kk Image data compression system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579154A (en) * 1978-12-05 1980-06-14 Compugraphic Corp Method and device for photocomposition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579154A (en) * 1978-12-05 1980-06-14 Compugraphic Corp Method and device for photocomposition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60222255A (en) * 1984-02-21 1985-11-06 Hell Rudolf Dr Ing Gmbh Method and device for recording pattern such as character symbol, etc.
JPS6167887A (en) * 1984-09-10 1986-04-08 Allied Corp Method and apparatus for generating signal set indicating curve
JPS6167888A (en) * 1984-09-10 1986-04-08 Allied Corp Method for generating signal set indicating curve
JPS6184684A (en) * 1984-09-10 1986-04-30 Allied Corp Method of generating signal set for plotting curve
JPS63249194A (en) * 1987-04-06 1988-10-17 Canon Kk Image data compression system
JPS63249193A (en) * 1987-04-06 1988-10-17 Canon Kk Image data compression system

Also Published As

Publication number Publication date Type
GB2160384A (en) 1985-12-18 application
GB2160384B (en) 1986-07-30 grant
GB8508057D0 (en) 1985-05-01 grant

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