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SIBGRAPI
2009
IEEE
10 years 5 months ago
Detecting Buildings in Historical Photographs Using Bag-of-Keypoints
—The strategies for the preservation of historical documents can include their digitization, which is an effective way to make them publicly available while preventing degradatio...
Natalia C. Batista, Ana Paula Brandão Lopes...
SIBGRAPI
2009
IEEE
10 years 5 months ago
Scale-Space for Union of 3D Balls
Shape discretization through union of weighted points or balls appears as a common representation in different fields of computer graphics and geometric modeling. Among others, it...
Alex Laier Bordignon, Betina Vath, Thales Vieira, ...
SIBGRAPI
2009
IEEE
10 years 5 months ago
A Multi-linear Discriminant Analysis of 2D Frontal Face Images
We have designed and implemented a multi-linear discriminant method of constructing and quantifying statistically significant changes on human identity photographs. The method is...
Carlos E. Thomaz, Vagner do Amaral, Gilson Antonio...
SIBGRAPI
2009
IEEE
10 years 5 months ago
Geometry Super-Resolution by Example
Thales Vieira, Alex Laier Bordignon, Thomas Lewine...
SIBGRAPI
2009
IEEE
10 years 5 months ago
Hermite Interpolation of Implicit Surfaces with Radial Basis Functions
—We present the Hermite radial basis function (HRBF) implicits method to compute a global implicit function which interpolates scattered multivariate Hermite data (unstructured p...
Ives Macedo, Joao Paulo Gois, Luiz Velho
SIBGRAPI
2009
IEEE
10 years 5 months ago
Learning Discriminative Appearance-Based Models Using Partial Least Squares
Appearance information is essential for applications such as tracking and people recognition. One of the main problems of using appearance-based discriminative models is the ambig...
William Robson Schwartz, Larry S. Davis
SIBGRAPI
2009
IEEE
10 years 5 months ago
Multi-Frame Motion Detection for Active/Unstable Cameras
—Network cameras, extensively used in video surveillance, often allow pan-tilt-zoom functionality and are also subject to wind load and mount vibrations, thus causing video frame...
Mirko Ristivojevic, Janusz Konrad
SIBGRAPI
2009
IEEE
10 years 5 months ago
A Study of the Effect of Illumination Conditions and Color Spaces on Skin Segmentation
—This work aims at investigating the influence of luminance information and environment illumination on skin classification. We explore Bayesian approaches to perform automatic...
Diogo Kuiaski, Hugo Vieira Neto, Gustavo B. Borba,...
SIBGRAPI
2009
IEEE
10 years 5 months ago
Nude Detection in Video Using Bag-of-Visual-Features
Abstract—The ability to filter improper content from multimedia sources based on visual content has important applications, since text-based filters are clearly insufficient a...
Ana Paula Brandão Lopes, Sandra E. F. de Av...
SIBGRAPI
2009
IEEE
10 years 5 months ago
Fractal-JSEG: JSEG Using an Homogeneity Measurement Based on Local Fractal Descriptor
—This paper proposes an improved version for the JSEG color image segmentation algorithm, combining the classical JSEG algorithm and a local fractal operator that measures the fr...
Karin S. Komati, Evandro O. T. Salles, Maái...
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