WO1997016918A3 - Image scanning compression method - Google Patents

Image scanning compression method Download PDF

Info

Publication number
WO1997016918A3
WO1997016918A3 PCT/NZ1996/000118 NZ9600118W WO9716918A3 WO 1997016918 A3 WO1997016918 A3 WO 1997016918A3 NZ 9600118 W NZ9600118 W NZ 9600118W WO 9716918 A3 WO9716918 A3 WO 9716918A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
procedure
words
compressed
scan line
Prior art date
Application number
PCT/NZ1996/000118
Other languages
French (fr)
Other versions
WO1997016918A2 (en
Inventor
Harold Salive
Original Assignee
Kiwisoft Programs Ltd
Harold Salive
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 Kiwisoft Programs Ltd, Harold Salive filed Critical Kiwisoft Programs Ltd
Priority to AU72320/96A priority Critical patent/AU7232096A/en
Publication of WO1997016918A2 publication Critical patent/WO1997016918A2/en
Publication of WO1997016918A3 publication Critical patent/WO1997016918A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

A data compression procedure retains fine detail in a compressed version of an image. The procedure encodes into an output series of composite words (each having a header and a trailer) a series or stream of input data values from along a scan line in terms of classes of internal systematic trends over a small number of adjacent words, and takes no account of lines alongside the scan line being compressed. The header indicates the class of change in the incoming words; the trailer carries number, magnitude, or rate of change data. The procedure can shrink the data volume down to a quarter or less, yet still allows image analysis procedures such as label decoding to proceed using either re-expanded data (using the same rules in reverse) or data which is still in a shorthand or compressed state.
PCT/NZ1996/000118 1995-10-20 1996-10-21 Image scanning compression method WO1997016918A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72320/96A AU7232096A (en) 1995-10-20 1996-10-21 Image scanning compression method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ280307 1995-10-20
NZ28030795 1995-10-20

Publications (2)

Publication Number Publication Date
WO1997016918A2 WO1997016918A2 (en) 1997-05-09
WO1997016918A3 true WO1997016918A3 (en) 1997-07-31

Family

ID=19925516

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1996/000118 WO1997016918A2 (en) 1995-10-20 1996-10-21 Image scanning compression method

Country Status (2)

Country Link
AU (1) AU7232096A (en)
WO (1) WO1997016918A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103287A (en) * 1973-12-17 1978-07-25 Bell Telephone Laboratories, Incorporated Variable length codes for high quality image encoding
US4225885A (en) * 1977-02-12 1980-09-30 U.S. Philips Corporation Method and apparatus for adaptive transform coding of picture signals
US4325085A (en) * 1980-06-09 1982-04-13 Digital Communications Corporation Method and apparatus for adaptive facsimile compression using a two dimensional maximum likelihood predictor
US4590606A (en) * 1982-12-13 1986-05-20 International Business Machines Corporation Multi-function image processing system
US4626829A (en) * 1985-08-19 1986-12-02 Intelligent Storage Inc. Data compression using run length encoding and statistical encoding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103287A (en) * 1973-12-17 1978-07-25 Bell Telephone Laboratories, Incorporated Variable length codes for high quality image encoding
US4225885A (en) * 1977-02-12 1980-09-30 U.S. Philips Corporation Method and apparatus for adaptive transform coding of picture signals
US4325085A (en) * 1980-06-09 1982-04-13 Digital Communications Corporation Method and apparatus for adaptive facsimile compression using a two dimensional maximum likelihood predictor
US4590606A (en) * 1982-12-13 1986-05-20 International Business Machines Corporation Multi-function image processing system
US4626829A (en) * 1985-08-19 1986-12-02 Intelligent Storage Inc. Data compression using run length encoding and statistical encoding

Also Published As

Publication number Publication date
WO1997016918A2 (en) 1997-05-09
AU7232096A (en) 1997-05-22

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