Search Results for author: Alexandre X. Falcão

Found 10 papers, 0 papers with code

CNN Filter Learning from Drawn Markers for the Detection of Suggestive Signs of COVID-19 in CT Images

no code implementations16 Nov 2021 Azael M. Sousa, Fabiano Reis, Rachel Zerbini, João L. D. Comba, Alexandre X. Falcão

Here we propose a method that does not require either large annotated datasets or backpropagation to estimate the filters of a convolutional neural network (CNN).

Hierarchical Learning Using Deep Optimum-Path Forest

no code implementations18 Feb 2021 Luis C. S. Afonso, Clayton R. Pereira, Silke A. T. Weber, Christian Hook, Alexandre X. Falcão, João P. Papa

Bag-of-Visual Words (BoVW) and deep learning techniques have been widely used in several domains, which include computer-assisted medical diagnoses.

BIG-bench Machine Learning

Convolutional Neural Networks from Image Markers

no code implementations15 Dec 2020 Barbara C. Benato, Italos E. de Souza, Felipe L. Galvão, Alexandre X. Falcão

A technique named Feature Learning from Image Markers (FLIM) was recently proposed to estimate convolutional filters, with no backpropagation, from strokes drawn by a user on very few images (e. g., 1-3) per class, and demonstrated for coconut-tree image classification.

Classification General Classification +1

Deploying machine learning to assist digital humanitarians: making image annotation in OpenStreetMap more efficient

no code implementations17 Sep 2020 John E. Vargas-Muñoz, Devis Tuia, Alexandre X. Falcão

Locating populations in rural areas of developing countries has attracted the attention of humanitarian mapping projects since it is important to plan actions that affect vulnerable areas.

BIG-bench Machine Learning Humanitarian

Correcting rural building annotations in OpenStreetMap using convolutional neural networks

no code implementations24 Jan 2019 John E. Vargas-Muñoz, Sylvain Lobry, Alexandre X. Falcão, Devis Tuia

Rural building mapping is paramount to support demographic studies and plan actions in response to crisis that affect those areas.

Video Human Segmentation using Fuzzy Object Models and its Application to Body Pose Estimation of Toddlers for Behavior Studies

no code implementations29 May 2013 Thiago V. Spina, Mariano Tepper, Amy Esler, Vassilios Morellas, Nikolaos Papanikolopoulos, Alexandre X. Falcão, Guillermo Sapiro

Video object segmentation is a challenging problem due to the presence of deformable, connected, and articulated objects, intra- and inter-object occlusions, object motion, and poor lighting.

Object Pose Estimation +4

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