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		<citationkey>MedeirosMascMarqLapr:2002:EvAdWi</citationkey>
		<title>Evaluating an adaptive windowing scheme in speckle noise MAP filtering</title>
		<year>2002</year>
		<numberoffiles>1</numberoffiles>
		<size>729 KiB</size>
		<author>Medeiros, F. N. S.,</author>
		<author>Mascarenhas, N. D. A.,</author>
		<author>Marques, R. C. P.,</author>
		<author>Laprano, C. M.,</author>
		<editor>Gonçalves, Luiz Marcos Garcia,</editor>
		<editor>Musse, Soraia Raupp,</editor>
		<editor>Comba, João Luiz Dihl,</editor>
		<editor>Giraldi, Gilson,</editor>
		<editor>Dreux, Marcelo,</editor>
		<conferencename>Brazilian Symposium on Computer Graphics and Image Processing, 15 (SIBGRAPI)</conferencename>
		<conferencelocation>Fortaleza, CE, Brazil</conferencelocation>
		<date>October</date>
		<publisher>IEEE Computer Society</publisher>
		<publisheraddress>Los Alamitos</publisheraddress>
		<tertiarytype>Full Paper</tertiarytype>
		<organization>SBC - Brazilian Computer Society</organization>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<abstract>SAR images are corrupted by speckle noise, which degrades the  quality and interpretation of the images.  Speckle removal provides a better interpretability of SAR images if  the techniques perform the filtering without loss of spatial resolution and preserve fine details and edges. This work aims to redefine the neighborhood areas around the noisy pixel and in this area the local  mean and variance are computed to estimate the MAP filter parameters. The proposed modified MAP algorithm improves the ability to filter the speckle noise without blurring edges and  targets by applying the MAP estimator in the current adaptive window that is controlled by a measure of homogeneity  in the  area around the noisy pixel.  The effectiveness in reducing speckle by the  modified MAP filter is evaluated in terms of qualitative and  quantitative aspects such as line and edge preservation and the improvement of the signal to noise ratio.</abstract>
		<language>en</language>
		<targetfile>48.pdf</targetfile>
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		<notes>The conference was held in Fortaleza, CE, Brazil, from October 7 to 10.</notes>
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		<url>http://sibgrapi.sid.inpe.br/rep-/sid.inpe.br/banon/2002/10.23.12.08</url>
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