BR0102190A - Processo para a compressão de documentosdigitais com controle da taxa de compressão equalidade de imagem - Google Patents

Processo para a compressão de documentosdigitais com controle da taxa de compressão equalidade de imagem

Info

Publication number
BR0102190A
BR0102190A BR0102190-7A BR0102190A BR0102190A BR 0102190 A BR0102190 A BR 0102190A BR 0102190 A BR0102190 A BR 0102190A BR 0102190 A BR0102190 A BR 0102190A
Authority
BR
Brazil
Prior art keywords
data
compression
type
compressed
block
Prior art date
Application number
BR0102190-7A
Other languages
English (en)
Inventor
Norman W Zeck
Peter A Crean
Sang-Chul Kang
David E Rumph
George L Eldridge
William E Nelson
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of BR0102190A publication Critical patent/BR0102190A/pt

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • 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
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Patente de Invenção: "PROCESSO PARA A COMPRESSãO DEDOCUMENTOS DIGITAIS COM CONTROLE DA TAXA DECOMPRESSãO E QUALIDADE DE IMAGEM". A invençãorefere-se aos processo e aparelho para comprimir e descomprimirdocumentos eletrónicos, com máxima independência entredocumentos, e uma máxima flexibilidade na otimização dos modosde compressão. O processo inclui o recebimento de documentoscontendo combinações desconhecidas de diversos tipos dedados, incluindo combinações de dados digitalizados, dadosfinalizados por computador, dados comprimidos e/ou etiquetas definalização; a divisão da imagem recebida em tiras de blocosdeterminantes da própria imagem, cujos tipos de dados estãopresentes em cada bloco; a compressão de dados de cada tipo dedados presente em cada bloco com um processo de compressãootimizado para seu tipo de dados. Os dados digitalização podemser adicionalmente segmentados em diversos tipos de dadosdigitalização, onde cada tipo de dados é comprimido na dita etapade dados de compressão com um processo de compressãootimizado para o dito tipo de dados de imagem varrido. Se o tipo dedados recebido forem dados comprimidos, o processo poderáincluir as funções adicionais de determinar uma razão decompressão dos mesmos, e aceitar os dados comprimidos parauso, ou descomprimir e recomprimir os dados, com base naaceitabilidade da dita determinação de razão de compressão. égerado um conjunto de instrução que permite que os dados deinstrução de descompressão detalhada e os dados de imagemsejam combinados com os dados comprimidos transmitidos. Umaestrutura de dados é mostrada, a qual segrega os tipos de dados eos dados de instrução, e permite a independência deprocessamento de bloco para bloco e de tira para tira.
BR0102190-7A 2000-05-01 2001-04-30 Processo para a compressão de documentosdigitais com controle da taxa de compressão equalidade de imagem BR0102190A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20123100P 2000-05-01 2000-05-01
US09/727,824 US6731814B2 (en) 2000-05-01 2000-12-04 Method for compressing digital documents with control of image quality and compression rate

Publications (1)

Publication Number Publication Date
BR0102190A true BR0102190A (pt) 2001-12-26

Family

ID=26896533

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0102190-7A BR0102190A (pt) 2000-05-01 2001-04-30 Processo para a compressão de documentosdigitais com controle da taxa de compressão equalidade de imagem

Country Status (6)

Country Link
US (1) US6731814B2 (pt)
EP (1) EP1152595B1 (pt)
JP (1) JP2002057905A (pt)
BR (1) BR0102190A (pt)
CA (1) CA2345218C (pt)
DE (1) DE60137471D1 (pt)

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Also Published As

Publication number Publication date
CA2345218C (en) 2011-02-08
JP2002057905A (ja) 2002-02-22
US20010031092A1 (en) 2001-10-18
US6731814B2 (en) 2004-05-04
EP1152595B1 (en) 2009-01-21
DE60137471D1 (de) 2009-03-12
EP1152595A1 (en) 2001-11-07
CA2345218A1 (en) 2001-11-01

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