@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix org: <http://www.w3.org/ns/org#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.nasa.gov/dataset/35bf4156-503e-4cb6-b9e9-406482fc4a74> a dcat:Dataset ;
    dct:description """In this paper, we propose a novel approach to reduce the noise in Synthetic Aperture Radar (SAR) images using particle filters. Interpretation of SAR images is a difficult problem, since they are contaminated with a multiplicative noise, which is known as the “Speckle Noise”. In literature, the general approach  for removing\r
the speckle is to use the local statistics, which are computed in a square window. Here, we propose to use particle filters, which is a sequential Bayesian technique. The proposed method also uses the local statistics to denoise the images. Since this is a Bayesian\r
approach, the computed statistics of the window can be exploited as a priori information. Moreover, particle filters are sequential methods, which are more appropriate to handle the heterogeneous structure of the image. Computer simulations show that the proposed method provides better edge-preserving results with\r
satisfactory speckle removal, when compared to the results obtained by Gamma Maximum a posteriori (MAP) filter.""" ;
    dct:identifier "DASHLINK_212" ;
    dct:issued "2010-09-22"^^xsd:date ;
    dct:modified "2020-01-29"^^xsd:date ;
    dct:publisher <https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> ;
    dct:title "SAR Image Enhancement using Particle Filters" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Deniz Gencaga" ;
            vcard:hasEmail <mailto:dgencaga@gmail.com> ] ;
    dcat:distribution <https://data.nasa.gov/dataset/35bf4156-503e-4cb6-b9e9-406482fc4a74/resource/5a2ffc2d-f9cd-468b-b12c-3defa70f1fae> ;
    dcat:keyword "ames",
        "dashlink",
        "nasa" .

<https://data.nasa.gov/dataset/35bf4156-503e-4cb6-b9e9-406482fc4a74/resource/5a2ffc2d-f9cd-468b-b12c-3defa70f1fae> a dcat:Distribution ;
    dct:description "SAR image enhancement using particle filtering" ;
    dct:format "PDF" ;
    dct:identifier "5a2ffc2d-f9cd-468b-b12c-3defa70f1fae" ;
    dct:issued "2025-03-31T16:56:49.476475"^^xsd:dateTime ;
    dct:modified "2025-03-31T16:56:49.462618"^^xsd:dateTime ;
    dct:title "ESA_EUSC_conference_GENCAGA_etal.pdf" ;
    dcat:accessURL <https://c3.nasa.gov/dashlink/static/media/publication/ESA_EUSC_conference_GENCAGA_etal.pdf> ;
    dcat:mediaType "application/pdf" .

<https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> a org:Organization ;
    skos:prefLabel "NASA" ;
    foaf:name "NASA" .