Iris Localization
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Um algoritmo de segmentação de íris em tempo real / An iris segmentation algorithm in real time
Iris segmentation is one of the crucial operations involved in iris recognition. Accurate iris segmentation is fundamental for the success and precision of the subsequent feature extraction and recognition, and consequently the high performance level of the iris recognition system. Most iris segmentation approaches proposed in the literature require highly c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2011
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2. Reconhecimento de íris utilizando algoritmos genéticos e amostragem não uniforme / Iris Recognition using Genetic Algorithms and Non- Uniform Sampling,
O reconhecimento automático de pessoas utilizando-se características da íris é uma eficiente técnica biométrica que está sendo largamente estudada e aplicada em todo o mundo. Diversas etapas de processamento são necessárias para tornar possível a representação e a interpretação da informação contida na íris. Neste trabalho é apresentado o e
Publicado em: 2010
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3. Método de reconhecimento pessoal através da íris usando funções geoestatísticas / Method of personal recognition through iris texture using geostatistics functions
Biometrics identification methods are gaining applications each day and this has motivated a lot of research in this area. This work presents a proposal for a method to identify people through iris texture analysis using geostatistics functions and their combination. To achieve this work objective, it is considered the following phases: automatic localizatio
Publicado em: 2006
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4. The trans-Golgi network-associated human ubiquitin-protein ligase POSH is essential for HIV type 1 production
HIV type 1 (HIV-1) was shown to assemble either at the plasma membrane or in the membrane of late endosomes. Now, we report an essential role for human ubiquitin ligase POSH (Plenty of SH3s; hPOSH), a trans-Golgi network-associated protein, in the targeting of HIV-1 to the plasma membrane. Small inhibitory RNA-mediated silencing of hPOSH ablates virus secret
National Academy of Sciences.
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5. Cellular and subcellular localization of protein I in the peripheral nervous system.
The cellular and subcellular distribution of protein I, a major brain phosphoprotein, has been studied in the peripheral nervous system. The levels of protein I in various peripheral nerves and innervated peripheral tissues were determined by radioimmunoassay and radioimmunolabeling of polyacrylamide gels. The results indicated tha protein I is present throu
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6. Localization of carbonic anhydrase IV in a specific capillary bed of the human eye.
Carbonic anhydrase (CA) activity plays an important role in controlling aqueous humor production in the eye and in regulating intraocular pressure. Prior studies identified the soluble isozymes CA II and CA I in the human eye and also suggested a distinct membrane-associated CA. We used an antibody to CA IV, the membrane-anchored isozyme from human lung, to
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7. Cellular localization of nerve growth factor synthesis by in situ hybridization.
A very sensitive and specific method for in situ hybridization has been developed. This method detects low copy numbers of mRNA(NGF) transcripts in both tissue sections and cultured cells using 35S-labelled cRNA and oligonucleotide probes. In order to reduce the high nonspecific background occurring with 35S-labelled probes, prehybridization in the presence
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8. An alternative pathway for rod signals in the rodent retina: Rod photoreceptors, cone bipolar cells, and the localization of glutamate receptors
In the mammalian retina, extensive processing of spatiotemporal and chromatic information occurs. One key principle in signal transfer through the retina is parallel processing. Two of these parallel pathways are the ON- and OFF-channels transmitting light and dark signals. This dual system is created in the outer plexiform layer, the first relay station in
The National Academy of Sciences.