<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div><span style="font-size: small; color: rgb(69, 69, 69); font-family: "Helvetica Neue";">Prezados Colegas,</span></div><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Na próxima quarta-feira, dia <b>28 de abril, às 15h00</b>, vamos dar continuidade aos Seminários em Estatística e Ciência de Dados da Universidade Federal da Bahia. </span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Este seminário será ministrado pelo <b>Professor Fábio Mariano Bayer</b>. O Fábio tem doutorado em Estatística (2011) pela Universidade Federal de Pernambuco (UFPE) e graduação em Matemática (2006) pela Universidade Federal de Santa Maria (UFSM). É professor do Departamento de Estatística da UFSM e pesquisador do Laboratório de Ciências Espaciais de Santa Maria (LACESM/CRS/INPE). No biênio 2017-2019 foi membro do Comitê de Assessoramento da área de Ciências Exatas da FAPERGS, em 2019 foi Pesquisador Visitante junto ao Telecommunications and Remote Sensing Laboratory, Pavia, Itália, e atualmente é Topical Associate Editor da área de statistical signal processing da IEEE Transactions on Geoscience and Remote Sensing. Possui interesses em métodos estatísticos computacionais, onde suas principais áreas de interesse e atividade são: ciência de dados, inferência clássica, modelos de regressão, modelos dinâmicos e processamento estatístico de sinais.</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Os detalhes do seminários são os seguintes:</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">====================================================</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;"><b>Title</b>: A 3-D Spatiotemporal Model for Remote Sensing Data Cubes</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;"><b>Abstract</b>: </span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Satellite images from the same scene observed over time can be composed in an image stack, which could be modeled as a 3-D cube. To handle this type of remote sensing data, on the one side, unidimensional dynamical models have been considered, modeling each pixel separately along the time (pixel-based approach), and exploring the temporal correlation. On the other side, 2-D approaches have been considered to process each image at one date, exploring the spatial correlation. In this article, we propose a new 3-D autoregressive (AR) (3-D-AR) model useful for multitemporal image interpretation exploring the correlation in three dimensions altogether. The 3-D-AR model is statistically defined, and a robust parameter estimation method is discussed. The tools for filtering, forecasting, and detecting anomalies are also introduced. A Monte Carlo simulation study is performed to evaluate the finite signal length performance of the robust estimation and its sensitivity to outliers. The proposed model is applied to a multitemporal normalized difference vegetation index (NDVI) image stack for filtering, prediction, and anomaly detection purposes. The numerical results show the importance of the proposed 3-D-AR model for spatiotemporal remote sensing data interpretation.</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">This is a joint work with Débora M. Bayer and Paolo Gamba recently published in IEEE Transactions on Geoscience and Remote Sensing (<span style="color: #e4af0a;"><a href="https://ieeexplore.ieee.org/document/9112636" target="_blank">https://ieeexplore.ieee.org/document/9112636</a></span></span><span style="font-size: small;">)</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;"><b>Data</b>: 15h00 do dia 28 de abril de 2021 </span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;"> </span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;"><b>Transmissão ao vivo online em</b>: <span style="color: #e4af0a;"><a href="http://meet.google.com/xhp-dgzn-ehp" target="_blank">meet.google.com/xhp-dgzn-ehp</a></span></span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">==================================================== </span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Partilhem com os vossos colegas!</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">São todos bem vindos!</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545; min-height: 14px;"><br></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Um abraço,</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Paulo Canas Rodrigues</span></p><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: 'Helvetica Neue'; color: #454545;"><span style="font-size: small;">Paulo Henrique Ferreira</span></p></div><div><br></div><div>-- <br></div><div><span></span>Paulo H. Ferreira<br>Professor Adjunto<br>Departamento de Estatística<br>Instituto de Matemática e Estatística<br>Universidade Federal da Bahia<br>CV: <a href="http://lattes.cnpq.br/8538524597034643" target="_blank">http://lattes.cnpq.br/8538524597034643</a></div></div></div></div></body></html>