Automatic Methodology for Mass Detection of Past Deforestation in Brazilian Amazon - Daniel C. Zanotta; Letícia F. Sartorio; Anniely S. Lemos; Eduarda G. Machado; Fabiano S. Dias (2019 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2019, Yokohama, Japan, July 28 - August 2, 2019, 2019)