{ "_id": "6aee43b8482d117aebab60f8", "Package": "SITSAR", "Title": "Information Theory, Geometry and Statistics for Synthetic\nAperture Radar Data", "Version": "1.0.0", "Authors@R": "c(\nperson(\"Jodavid\", \"Ferreira\", , \"jodavid@protonmail.com\", role = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0002-2131-6464\")),\nperson(\"Abraao\", \"Nascimento\", , \"abraao@de.ufpe.br\", role = \"aut\",\ncomment = c(ORCID = \"0000-0003-2673-219X\"))\n)", "Description": "Statistical models, information-theoretic measures and\nimage analysis tools for Synthetic Aperture Radar (SAR) and\npolarimetric SAR (PolSAR) data. It implements intensity models\n(Gamma, generalized Gamma and G0I) and matrix models (scaled\ncomplex Wishart, G0 polarimetric and the compound truncated\nPoisson and compound geometric complex Wishart laws), maximum\nlikelihood and expectation-maximization estimation, closed-form\nShannon entropies with their asymptotic variances,\nentropy-based hypothesis tests and change detection,\nentropy-based image segmentation by (stochastic)\nexpectation-maximization, stochastic distances and a family of\ndivergence-based classifiers (Kullback-Leibler, Jeffreys,\nBhattacharyya and Renyi) for Gaussian vector features and\ncomplex Wishart matrix features. The main tools are 'R6'\nclasses and the classifiers are available as a 'parsnip' model,\nso they can be used inside 'tidymodels' workflows. Methods are\ndescribed in Ferreira, Coelho and Nascimento (2021)\n, Ferreira and Nascimento\n(2020) , Ferreira, Nascimento\nand Frery (2022) and Nascimento,\nFerreira and Frery (2023) .", "License": "MIT + file LICENSE", "URL": "https://github.com/jodavid/SITSAR,\nhttps://jodavid.github.io/SITSAR/", "BugReports": "https://github.com/jodavid/SITSAR/issues", "VignetteBuilder": "knitr", "Config/testthat/edition": "3", "Encoding": "UTF-8", "Language": "en-US", "LazyData": "true", "LazyDataCompression": "xz", "Config/roxygen2/version": "8.1.0", "NeedsCompilation": "no", "Packaged": { "Date": "2026-11-06 21:12:55 UTC", "User": "root" }, "Author": "Jodavid Ferreira [aut, cre] (ORCID:\n), Abraao Nascimento\n[aut] (ORCID: )", "Maintainer": "Jodavid Ferreira ", "Repository": "https://cran.r-universe.dev", "Date/Publication": "2026-11-06 18:07:14 UTC", "RemoteUrl": "https://github.com/cran/SITSAR", "RemoteRef": "HEAD", "RemoteSha": "bb5ba281cb1920c64cda0dd20247d4fb1d9c95fe", "_user": "cran", 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