Results 21 to 30 of about 115 (69)

The isotropic correlation function of plane figures: the triangle case

, 2010
The knowledge of the isotropic correlation function of a plane figure is useful to determine the correlation function of the cylinders having the plane figure as right-section and a given height as well as to analyze the out of plane intensity collected ...
Aharonyan NG, Burger C, Gille W, Gille W, Guinier A, Harutyunyan HS, Salvino Ciccariello   +6 more
core   +1 more source

Clifford Fourier-Mellin transform with two real square roots of -1 in Cl(p,q), p+q=2

, 2012
We describe a non-commutative generalization of the complex Fourier-Mellin transform to Clifford algebra valued signal functions over the domain $\R^{p,q}$ taking values in Cl(p,q), p+q=2.
Hitzer, Eckhard
core   +1 more source

A precise method for visualizing dispersive features in image plots

, 2011
In order to improve the advantages and the reliability of the second derivative method in tracking the position of extrema from experimental curves, we develop a novel analysis method based on the mathematical concept of curvature. We derive the formulas
Dai, X., Ding, H., Qian, T., Richard, P., Xu, Y. -M., Zhang, P.   +5 more
core   +1 more source

Measuring Leaf Chlorophyll Concentration from Its Color: A Way in Monitoring Environment Change to Plantations

, 2013
Leaf colors of a plant can be used to identify stress level due to its adaptation to environmental change. For most leaves green-related colors are sourced from chlorophyll a and b. Chlorophyll concentration is normally measured using a spectrophotometer
Kesuma, Teja, Khotimah, Siti Nurul, Shibghatallah, Muhammad Abdul Hakim, Suhandono, Sony, Viridi, Sparisoma   +4 more
core   +1 more source

Errors in particle tracking velocimetry with high-speed cameras

, 2011
Velocity errors in particle tracking velocimetry (PTV) are studied. When using high-speed video cameras, the velocity error may increase at a high camera frame rate. This increase in velocity error is due to particle-position uncertainty, which is one of
Feng, Yan, Goree, J., Liu, Bin
core   +1 more source

Single exposure 3D imaging of dusty plasma clusters

, 2012
We have worked out the details of a single camera, single exposure method to perform three-dimensional imaging of a finite particle cluster. The procedure is based on the plenoptic imaging principle and utilizes a commercial Lytro light field still ...
Donkó, István, Donkó, Zoltán, Hartmann, Peter   +2 more
core   +1 more source

Dynamics and Topological Aspects of a Reconstructed Two-Dimensional Foam Time Series Using Potts Model on a Pinned Lattice

, 2003
We discuss a method to reconstruct an approximate two-dimensional foam structure from an incomplete image using the extended Potts mode with a pinned lattice we introduced in a previous paper.
Atkinson, Chen, Dormer, Durian, Durian, Fetterman, Fradkov, Fujiwara, Glantz, Glantz, Glauber, Glazier, Glazier, Gonatas, Graner, Herrera, Hidajat, Holm, Igor F. Vasconcelos, Isabelle Cantat, James A. Glazier, Jang, Jiang, Kad, Kammerer, Kawasaki, Krichevsky, Kulountzakis, Metropolis, Miyake, Monnereau, Monnereau, Monnereau, Monnereau, Monnereau, Morgan, Munoz, Pham, Plateau, Reiter, Soucail, Srolovitz, Srolovitz, Srolovitz, Srolovitz, Stavans, Sullivan, Suri, Thomson, Thomson (Lord Kelvin), Timonen, Weaire, Weaire, Wejchert, Wu, Zinzindohoue   +55 more
core   +2 more sources

Una propuesta para incrementar la capacidad discriminante de las técnicas PCA y LDA aplicadas al reconocimiento de rostros con imágenes IR

Ingeniería y Ciencia, 2011
Dos de las técnicas más ampliamente utilizadas en el campo del reconocimiento de rostros con imágenes infrarrojas son PCA (Principal Component Analisys) y LDA (Linear Discriminant Analysis).
Dúber Martínez, Humberto Loaiza C, Eduardo Caicedo B   +2 more
doaj  

Analysis and calibration of absorptive images of Bose-Einstein condensate at non-zero temperatures

, 2008
We describe the method allowing quantitative interpretation of absorptive images of mixtures of BEC and thermal atoms which reduces possible systematic errors associated with evaluation of the contribution of each fraction.
Abramoff M. D., Huang K., J. Szczepkowski, L. Tracewski, M. Witkowski, M. Zawada, R. Gartman, W. Gawlik   +7 more
core   +1 more source

Cryptanalysis of a multi-chaotic systems based image cryptosystem [PDF]

, 2010
This paper is a cryptanalysis of a recently proposed multi-chaotic systems based image cryptosystem. The cryptosystem is composed of two shuffling stages parameterized by chaotically generated sequences.
Belghith, Safya Mdimegh, Rhouma, Rhouma, Solak, Ercan   +2 more
core   +1 more source