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Canadian Patents Database

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Patent Summary

(12) Patent: (11) CA 2253145
(54) English Title: SYSTEM FOR INTERACTIVE VISUALIZATION AND ANALYSIS OF IMAGING SPECTROMETRY DATASETS OVER A WIDE-AREA NETWORK
(54) French Title: SYSTEME DE VISUALISATION ET D'ANALYSE INTERACTIVES D'ENSEMBLES DE DONNEES DE RADIOMETRIE SPECTRALE IMAGEANTE AU MOYEN D'UN RESEAU A GRANDE DISTANCE

Abstracts

English Abstract

The present invention relates to a method of viewing and processing hyper- spectral image data compressed using a VQ algorithm. According to the invention the data is compressed using a codebook of codevectors including binary spectral vectors, which allows processing of the compressed data and viewing of data within a datacube without expanding the compressed data into the complete datacube. In order to view an image derived from a datacube, for each pixel within the image a location within the datacube is selected, an index value from the index map at that location is retrieved, and a spectral value from a spectral vector within the codebook is retrieved for said pixel, the spectral vector identified by the retrieved index. A single spectral vector is easily viewed by displaying a spectral vector from the codebook.


French Abstract

La présente invention se rapporte à une méthode qui permet d'afficher et traiter des données d'images hyperspectrales comprimées à l'aide d'un algorithme de quantification vectorielle. Selon l'invention, les données sont comprimées à l'aide d'une table de codes de vecteurs de code comprenant des vecteurs spectraux binaires, permettant ainsi de traiter les données comprimées et de les afficher dans un cube de données sans que celles-ci se déploient sur l'ensemble du cube de données. Afin d'afficher une image provenant d'un cube de données, un emplacement est sélectionné au sein de ce dernier pour chaque pixel de l'image, une valeur d'indice est ensuite extraite d'une carte-index à cet emplacement , puis une valeur spectrale est extraite d'un vecteur spectral de la table de codes pour ledit pixel, le vecteur spectral étant ainsi identifié par l'indice extrait. Un vecteur spectral unique est aisément visible par l'affichage d'un vecteur spectral provenant d'une table de codes.



Patent Details

(51) International Patent Classification (IPC):
  • H04N 19/94 (2014.01)
  • G01J 3/02 (2006.01)
(72) Inventors (Country):
  • HOLLINGER, ALLAN B. (Canada)
  • QIAN, SHEN-EN (Canada)
  • WILLIAMS, DANIEL J. (Canada)
(73) Owners (Country):
  • CANADIAN SPACE AGENCY (Canada)
(71) Applicants (Country):
  • CANADIAN SPACE AGENCY (Canada)
(74) Agent: MACRAE & CO.
(45) Issued: 2006-12-12
(22) Filed Date: 1998-10-30
(41) Open to Public Inspection: 1999-04-30
Examination requested: 2003-07-16
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
2,219,809 Canada 1997-10-31
60/063,796 United States of America 1997-10-31

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Cover Page Cover Page 48 2
Abstract Abstract 22 1
Claims Claims 371 9
Description Description 1,463 32
Drawings Drawings 117 5
Representative Drawing Representative Drawing 10 1

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