18 citations · 36 across the 14 of their papers we have counts for
6 papers · 1 filter
Applying Lie Groups Approaches for Rigid Registration of Point Clouds
Liliane Rodrigues de Almeida, Gilson A. Giraldi, Marcelo Bernardes Vieira
In the last decades, some literature appeared using the Lie groups theory to solve problems in computer vision. On the other hand, Lie algebraic representations of the transformati…
Is human face processing a feature- or pattern-based task? Evidence using a unified computational method driven by eye movements
Carlos E. Thomaz, Vagner Amaral, Gilson A. Giraldi +2
Research on human face processing using eye movements has provided evidence that we recognize face images successfully focusing our visual attention on a few inner facial regions,…
Fourier Analysis and q-Gaussian Functions: Analytical and Numerical Results
Paulo Sérgio Silva Rodrigues, Gilson Antonio Giraldi
It is a consensus in signal processing that the Gaussian kernel and its partial derivatives enable the development of robust algorithms for feature detection. Fourier analysis and…
Fourier Analysis and Holographic Representations of 1D and 2D Signals
G. A. Giraldi, B. F. Moutinho, D. M. L. de Carvalho +1
In this paper, we focus on Fourier analysis and holographic transforms for signal representation. For instance, in the case of image processing, the holographic representation has…
Convexity Analysis of Snake Models Based on Hamiltonian Formulation
Gilson Antonio Giraldi, Antonio Alberto Fernandes de Oliveira
This paper presents a convexity analysis for the dynamic snake model based on the Potential Energy functional and the Hamiltonian formulation of the classical mechanics. First we s…
Gradient Vector Flow Models for Boundary Extraction in 2D Images
Gilson A. Giraldi, Leandro S. Marturelli, Paulo S. Rodrigues
The Gradient Vector Flow (GVF) is a vector diffusion approach based on Partial Differential Equations (PDEs). This method has been applied together with snake models for boundary e…