Rotation Invariance
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Time Reversal Imaging Based on the Space-Frequency ESPRIT
Abstract A novel time reversal approach for the point target imaging is proposed in this paper. This method requires only single measurement by the time reversal array, and it exploits the space-frequency decomposition plus the rotation invariance of the signal subspace for the target detecting. Numerical simulations are carried out to validate the imaging p
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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2. Automatic VHDL generation for solving rotation and scale-invariant template matching in FPGA. / Geração automática de módulos VHDL para localização de padrões invariante a escala e rotação em FPGA.
Template matching is a classical problem in computer vision. It consists in detecting the presence of a given template in a digital image. This task becomes considerably more complex with the invariance to rotation, scale, translation, brightness and contrast (RSTBC). A novel RSTBC-invariant robust template matching algorithm named Ciratefi was recently prop
Publicado em: 2009
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3. Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial / FDTD formalism for modelling of the dispersive media introducing biaxial anisotropy
This work introduces an extended two-dimensional finite difference time domain method (2D-FDTD) for the simulation of metamaterial based structures. The dispersive nature of these media is accurately taken into account through the inclusion of the Drude material models for the permittivity and permeability tensors. All tensor elements are properly accounted
Publicado em: 2008
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4. Metodologia para extração de características invariantes à rotação em imagens de impressões digitais / Methodology for the extraction of features invariant to the rotation in fingerprint images
The objective of this research is to present algorithms that can be applied in fingerprints images in order to extract certain features, which are invariant to an likely rotation in the given image. In the preprocessing stage, the Canny border detector is used, resulting in a binary, fine tuned image. For the minutiae extraction, the crossing number method i
Publicado em: 2006
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5. Novozhilov's mean rotation measures invariance
In this article the invariance of the Novozhilov's mean rotation measures will be emphasize by the invariance of the determinant of the gradient of deformation tensor of continuum mechanics, or the invariance of the second principal invariant of the tensor (I + E)-1 W.
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-09
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6. First-order analysis of optical flow in monkey brain.
Optical flow is a rich source of information about the three-dimensional motion and structure of the visual environment. Little is known of how the brain derives this information. One possibility is that it analyzes first-order elementary components of optical flow, such as expansion, rotation, and shear. Using a combination of physiological recordings and m