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8 lines
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8 lines
2.7 KiB
HTML
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</head><body><h1>HyperspectralUnmixing</h1><h2>Brief Description</h2>Estimate abundance maps from an hyperspectral image and a set of endmembers.<h2>Tags</h2>Hyperspectral<h2>Long Description</h2>The application applies a linear unmixing algorithm to an hyperspectral data cube. This method supposes that the mixture between materials in the scene is macroscopic and simulates a linear mixing model of spectra.
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The Linear Mixing Model (LMM) acknowledges that reflectance spectrum associated with each pixel is a linear combination of pure materials in the recovery area, commonly known as endmembers. Endmembers can be estimated using the VertexComponentAnalysis application.
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The application allows to estimate the abundance maps with several algorithms : Unconstrained Least Square (ucls), Fully Constrained Least Square (fcls), Image Space Reconstruction Algorithm (isra) and Non-negative constrained Least Square (ncls) and Minimum Dispertion Constrained Non Negative Matrix Factorization (MDMDNMF).
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<h2>Parameters</h2><ul><li><b>[param] -in</b> <string> The hyperspectral data cube to unmix. Mandatory: True. Default Value: ""</li><li><b>[param] -out</b> <string> The output abundance map. Mandatory: True. Default Value: ""</li><li><b>[param] -ie</b> <string> The endmembers (estimated pure pixels) to use for unmixing. Must be stored as a multispectral image, where each pixel is interpreted as an endmember. Mandatory: True. Default Value: ""</li><b>[choice] -ua</b> The algorithm to use for unmixing ucls,ncls,isra,mdmdnmf. Mandatory: False. Default Value: "ucls"<ul><li><b>[group] -ucls</b></li><ul></ul><li><b>[group] -ncls</b></li><ul></ul><li><b>[group] -isra</b></li><ul></ul><li><b>[group] -mdmdnmf</b></li><ul></ul></ul></ul><h2>Limitations</h2>None<h2>Authors</h2>OTB-Team<h2>See Also</h2>VertexComponentAnalysis<h2>Example of use</h2><ul><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">in: cupriteSubHsi.tif</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">ie: cupriteEndmembers.tif</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">out: HyperspectralUnmixing.tif double</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">ua: ucls</p></li></ul></body></html> |