GB1517869A - Image encoding apparatus - Google Patents

Image encoding apparatus

Info

Publication number
GB1517869A
GB1517869A GB53034/76A GB5303476A GB1517869A GB 1517869 A GB1517869 A GB 1517869A GB 53034/76 A GB53034/76 A GB 53034/76A GB 5303476 A GB5303476 A GB 5303476A GB 1517869 A GB1517869 A GB 1517869A
Authority
GB
United Kingdom
Prior art keywords
bits
pel
segments
segment
reference
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.)
Expired
Application number
GB53034/76A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to GB53034/76A priority Critical patent/GB1517869A/en
Publication of GB1517869A publication Critical patent/GB1517869A/en
Application status is Expired legal-status Critical

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00Image coding
    • G06T9/20Contour coding, e.g. using detection of edges
    • 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
    • G06K9/54Combinations of preprocessing functions
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K2209/00Indexing scheme relating to methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K2209/01Character recognition

Abstract

1517869 Image encoding apparatus INTERNATIONAL BUSINESS MACHINES CORP 20 Dec 1976 53034/76 Heading H4P Data in the form of a stream of bits representing picture elements (pels), derived from the raster scanning of a document 1, is stored in compressed form in a store 8 which can be accessed so that the data pertaining to the stored document can be transmitted to a receiver 13 or can be expanded in a decompressor 9 for plotting or printing by a plotter 10 or for display on a display unit. The required compression is effected by passing the original bit stream through a pel stripper 3 where bits are removed to leave a processed bit pattern in which the bits represent predominantly single-pel-width strokes constituting either the outlines or the centre lines of characters. A segment follower 6 detects contiguous bits and produces a series of segments representing the tracked strokes. Each segment is coded in an encoder 7 into code words representing the shape of the segments and code words representing the end points of the segments, the segment bit thus produced being stored in the store 8. The stripping process is described with reference to Fig. 2 (not shown), whilst the constraints which determine whether a pel is or is not stripped from the original bit stream are described with reference to Figs. 5 and 6 (not shown). Suitable arrangements for the units 3, 6 and 7 are described with reference to Figs. 7 to 13 (not shown).
GB53034/76A 1976-12-20 1976-12-20 Image encoding apparatus Expired GB1517869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB53034/76A GB1517869A (en) 1976-12-20 1976-12-20 Image encoding apparatus

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB53034/76A GB1517869A (en) 1976-12-20 1976-12-20 Image encoding apparatus
CA290,044A CA1089991A (en) 1976-12-20 1977-11-02 Image encoding apparatus
FR7734669A FR2374698B1 (en) 1976-12-20 1977-11-10
IT29883/77A IT1114673B (en) 1976-12-20 1977-11-22 An improved apparatus for coding of images
DE19772754230 DE2754230A1 (en) 1976-12-20 1977-12-06 Arrangement for the coded representation of data
JP14577177A JPS5646176B2 (en) 1976-12-20 1977-12-06
AU3161477A AU508981B2 (en) 1976-12-20 1977-12-15 Image coding apparatus

Publications (1)

Publication Number Publication Date
GB1517869A true GB1517869A (en) 1978-07-12

Family

ID=10466361

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53034/76A Expired GB1517869A (en) 1976-12-20 1976-12-20 Image encoding apparatus

Country Status (7)

Country Link
JP (1) JPS5646176B2 (en)
AU (1) AU508981B2 (en)
CA (1) CA1089991A (en)
DE (1) DE2754230A1 (en)
FR (1) FR2374698B1 (en)
GB (1) GB1517869A (en)
IT (1) IT1114673B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915381B2 (en) * 1978-10-16 1984-04-09 Nippon Telegraph & Telephone
JPH0420223B2 (en) * 1983-06-24 1992-04-02 Sumitomo Electric Industries
FR2552570B1 (en) * 1983-09-28 1989-02-24 Sacsi Process for reading digital form, with compression by pattern recognition of a document
DE3853885D1 (en) * 1988-12-30 1995-06-29 Ezel Inc Vektorisationsverfahren.

Also Published As

Publication number Publication date
JPS5646176B2 (en) 1981-10-31
AU508981B2 (en) 1980-04-17
DE2754230A1 (en) 1978-06-22
CA1089991A (en) 1980-11-18
JPS5386532A (en) 1978-07-31
IT1114673B (en) 1986-01-27
FR2374698B1 (en) 1980-08-22
FR2374698A1 (en) 1978-07-13
AU3161477A (en) 1979-06-21
CA1089991A1 (en)

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Legal Events

Date Code Title Description
PS Patent sealed
CSNS Application of which complete specification have been accepted and published, but patent is not sealed
CSNS Application of which complete specification have been accepted and published, but patent is not sealed

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