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Temporal and Spatial Data Mining with Second-Order Hidden Markov Models

Identifieur interne : 004A33 ( Hal/Curation ); précédent : 004A32; suivant : 004A34

Temporal and Spatial Data Mining with Second-Order Hidden Markov Models

Auteurs : Jean-François Mari [France] ; Florence Le Ber [France]

Source :

RBID : Hal:inria-00000007

Abstract

In the frame of designing a knowledge discovery system, we have developed stochastic models based on high-order hidden Markov models. These models are capable to map sequences of data into a Markov chain in which the transitions between the states depend on the \texttt{n} previous states according to the order of the model. We study the process of achieving information extraction fromspatial and temporal data by means of an unsupervised classification. We use therefore a French national database related to the land use of a region, named Teruti, which describes the land use both in the spatial and temporal domain. Land-use categories (wheat, corn, forest, ...) are logged every year on each site regularly spaced in the region. They constitute a temporal sequence of images in which we look for spatial and temporal dependencies. The temporal segmentation of the data is done by means of a second-order Hidden Markov Model (\hmmd) that appears to have very good capabilities to locate stationary segments, as shown in our previous work in speech recognition. Thespatial classification is performed by defining a fractal scanning ofthe images with the help of a Hilbert-Peano curve that introduces atotal order on the sites, preserving the relation ofneighborhood between the sites. We show that the \hmmd performs aclassification that is meaningful for the agronomists.Spatial and temporal classification may be achieved simultaneously by means of a 2 levels \hmmd that measures the \aposteriori probability to map a temporal sequence of images onto a set of hidden classes.

Url:
DOI: 10.1007/s00500-005-0501-0

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Hal:inria-00000007

Le document en format XML

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<idno type="halJournalId" status="INCOMING">75859</idno>
<title level="j">Soft Computing</title>
<imprint>
<publisher>Springer-Verlag</publisher>
<biblScope unit="volume">10</biblScope>
<biblScope unit="issue">5</biblScope>
<biblScope unit="pp">406 -- 414</biblScope>
<date type="datePub">2006-01-23</date>
</imprint>
</monogr>
<idno type="arxiv">cs.AI/0505018</idno>
<idno type="doi">10.1007/s00500-005-0501-0</idno>
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<language ident="en">English</language>
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<keywords scheme="author">
<term xml:lang="id">HMM</term>
<term xml:lang="id">data mining</term>
</keywords>
<classCode scheme="halDomain" n="info.info-ai">Computer Science [cs]/Artificial Intelligence [cs.AI]</classCode>
<classCode scheme="halTypology" n="ART">Journal articles</classCode>
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<abstract xml:lang="en">In the frame of designing a knowledge discovery system, we have developed stochastic models based on high-order hidden Markov models. These models are capable to map sequences of data into a Markov chain in which the transitions between the states depend on the \texttt{n} previous states according to the order of the model. We study the process of achieving information extraction fromspatial and temporal data by means of an unsupervised classification. We use therefore a French national database related to the land use of a region, named Teruti, which describes the land use both in the spatial and temporal domain. Land-use categories (wheat, corn, forest, ...) are logged every year on each site regularly spaced in the region. They constitute a temporal sequence of images in which we look for spatial and temporal dependencies. The temporal segmentation of the data is done by means of a second-order Hidden Markov Model (\hmmd) that appears to have very good capabilities to locate stationary segments, as shown in our previous work in speech recognition. Thespatial classification is performed by defining a fractal scanning ofthe images with the help of a Hilbert-Peano curve that introduces atotal order on the sites, preserving the relation ofneighborhood between the sites. We show that the \hmmd performs aclassification that is meaningful for the agronomists.Spatial and temporal classification may be achieved simultaneously by means of a 2 levels \hmmd that measures the \aposteriori probability to map a temporal sequence of images onto a set of hidden classes.</abstract>
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