Search Results - "Alexandre X. Falcão"

Rethinking interactive image segmentation: Feature space annotation by Bragantini, Jordão, Falcão, Alexandre X., Najman, Laurent

“…•A method to fastly annotate various objects in multiple images at the same time.•A new user interface paradigm for image annotation.•A strategy to learn and…”
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Correcting rural building annotations in OpenStreetMap using convolutional neural networks by Vargas-Muñoz, John E., Lobry, Sylvain, Falcão, Alexandre X., Tuia, Devis

“…Rural building mapping is paramount to support demographic studies and plan actions in response to crisis that affect those areas. Rural building annotations…”
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Deploying machine learning to assist digital humanitarians: making image annotation in OpenStreetMap more efficient by Vargas Muñoz, John E., Tuia, Devis, Falcão, Alexandre X.

“…Locating populations in rural areas of developing countries has attracted the attention of humanitarian mapping projects since it is important to plan actions…”
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High-Resolution Inflorescence Phenotyping Using a Novel Image-Analysis Pipeline, PANorama by Crowell, Samuel, Falcão, Alexandre X., Shah, Ankur, Wilson, Zachary, Greenberg, Anthony J., McCouch, Susan R.

“…Variation in inflorescence development is an important target of selection for numerous crop species, including many members of the Poaceae (grasses). In Asian…”
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ALTIS: A fast and automatic lung and trachea CT‐image segmentation method by Sousa, Azael M., Martins, Samuel B., Falcão, Alexandre X., Reis, Fabiano, Bagatin, Ericson, Irion, Klaus

“…Purpose The automated segmentation of each lung and trachea in CT scans is commonly taken as a solved problem. Indeed, existing approaches may easily fail in…”
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Grabber: A tool to improve convergence in interactive image segmentation by Bragantini, Jordão, Moura, Bruno, Falcão, Alexandre X., Cappabianco, Fábio A.M.

“…•A tool, named Grabber, to increase user control in interactive segmentation.•Grabber can be integrated with any other method.•Grabber can improve convergence,…”
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Projections as visual aids for classification system design by Rauber, Paulo E, Falcão, Alexandre X, Telea, Alexandru C

“…Dimensionality reduction is a compelling alternative for high-dimensional data visualization. This method provides insight into high-dimensional feature spaces…”
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Medical image segmentation via atlases and fuzzy object models: Improving efficacy through optimum object search and fewer models by Phellan, Renzo, Falcão, Alexandre X., Udupa, Jayaram K.

“…Purpose: Statistical object shape models (SOSMs), known as probabilistic atlases, are popular in medical image segmentation. They register an image into the…”
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Investigating the impact of supervoxel segmentation for unsupervised abnormal brain asymmetry detection by Martins, Samuel B., Telea, Alexandru C., Falcão, Alexandre X.

“…•Several brain disorders are associated with abnormal brain asymmetries (asymmetric anomalies).•Automatic supervoxel-voxel based method for abnormal asymmetry…”
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A methodology for generating four-dimensional arterial spin labeling MR angiography virtual phantoms by Phellan, Renzo, Lindner, Thomas, Helle, Michael, Falcão, Alexandre X., Okell, Thomas W., Forkert, Nils D.

“…•Methodology for the generation of annotated 4D ASL MRA virtual phantoms, with geometric and blood flow ground-truth data.•The phantoms can be used as…”
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Computer techniques towards the automatic characterization of graphite particles in metallographic images of industrial materials by Papa, João P., Nakamura, Rodrigo Y.M., de Albuquerque, Victor Hugo C., Falcão, Alexandre X., Tavares, João Manuel R.S.

“…► Introduce the importance of efficient characterization of industrial materials. ► First use of OPF, SVM and Bayes based computer classifiers in such…”
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Joint graph cut and relative fuzzy connectedness image segmentation algorithm by Ciesielski, Krzysztof Chris, Miranda, Paulo A.V., Falcão, Alexandre X., Udupa, Jayaram K.

“…[Display omitted] •Novel image segmentation algorithm robust w.r.t. seed choice.•Synergistic combinantion of fuzzy connectedness (FC) and Graph Cut (GC)…”
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Choosing the Most Effective Pattern Classification Model under Learning-Time Constraint by Saito, Priscila T M, Nakamura, Rodrigo Y M, Amorim, Willian P, Papa, João P, de Rezende, Pedro J, Falcão, Alexandre X

“…Nowadays, large datasets are common and demand faster and more effective pattern analysis techniques. However, methodologies to compare classifiers usually do…”
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Towards a Simple and Efficient Object-based Superpixel Delineation Framework by Belem, Felipe C., Perret, Benjamin, Cousty, Jean, Guimaraes, Silvio J. F., Falcao, Alexandre X.

“…Superpixel segmentation methods are widely used in computer vision applications due to their properties in border delineation. These methods do not usually…”
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Visualizing the Hidden Activity of Artificial Neural Networks by Rauber, Paulo E., Fadel, Samuel G., Falcao, Alexandre X., Telea, Alexandru C.

“…In machine learning, pattern classification assigns high-dimensional vectors (observations) to classes based on generalization from examples. Artificial neural…”
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Efficient supervised optimum-path forest classification for large datasets by Papa, João P., Falcão, Alexandre X., de Albuquerque, Victor Hugo C., Tavares, João Manuel R.S.

“…Today data acquisition technologies come up with large datasets with millions of samples for statistical analysis. This creates a tremendous challenge for…”
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The image foresting transform: theory, algorithms, and applications by Falcao, A.X., Stolfi, J., de Alencar Lotufo, R.

“…The image foresting transform (IFT) is a graph-based approach to the design of image processing operators based on connectivity. It naturally leads to correct…”
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Differential and relaxed image foresting transform for graph-cut segmentation of multiple 3D objects by Moya, Nikolas, Falcão, Alexandre X, Ciesielski, Krzysztof C, Udupa, Jayaram K

“…Graph-cut algorithms have been extensively investigated for interactive binary segmentation, when the simultaneous delineation of multiple objects can save…”
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Learning Person-Specific Representations From Faces in the Wild by Chiachia, Giovani, Falcao, Alexandre X., Pinto, Nicolas, Rocha, Anderson, Cox, David

“…Humans are natural face recognition experts, far out-performing current automated face recognition algorithms, especially in naturalistic, "in the wild"…”
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Novel Arc-Cost Functions and Seed Relevance Estimations for Compact and Accurate Superpixels by Belém, Felipe C., Barcelos, Isabela B., João, Leonardo M., Perret, Benjamin, Cousty, Jean, Guimarães, Silvio J. F., Falcão, Alexandre X.

“…On the verge of superpixel methods exploiting saliency information, the Superpixels through Iterative CLEarcutting (SICLE) framework has reported fast and…”
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