Št. zadetkov: 14
Izvirni znanstveni članek
Oznake:
In this paper we present algorithms for measuring local characteristics of random fiber systems. The calculation of the local directions and radii is based on directional distance transforms and evaluation of the inertia momentsand axes of the resulring extremities of the centralized, directed chord ...
Leto:
2009
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
We use a method to estimate local orientations in the n-dimensional space fromthe covariance matrix of the gradient, which can be implemented either in the image space or in the Fourier space. In a second step, two methods allow us to detect sudden changes of orientation in images. The first one use ...
Leto:
2008
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
The percolation threshold pc of Boolean models of cylinders with their axis parallel to a given direction is studied by means of simulations. An efficientmethod of construction of percolating connected components was developed, and is applied to one or two scales Boolean model, in order to simulate ...
Leto:
2007
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
Starting from scanning electron microscope images of some food products, we generate binary images of composite materials. After measuring the covariance and the probability for segments and for squares to be included in the dominant component, we develop a modelling of the microstructure from rando ...
Leto:
2004
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
Composite materials containing aggregates of spherical inclusions are studied from 3D images obtained by X-ray microtomography. Using two point statistics in different directions, and the empirical distribution of orientations of pairs of inclusions, interesting details concerning the anisotropy of ...
Leto:
2003
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
This paper presents a method to simulate high density non overlapping sphere struetures with anisotropy and heterogeneity.
Leto:
2001
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
stereologija;obdelava slik;geodezija;
Computing an array of all pairs of geodesic distances between the pixels of animage is time consuming. In the sequel, we introduce new methods exploiting the redundancy of geodesic propagations and compare them to an existing one. We show that our method in which the source point of geodesic propaga ...
Leto:
2011
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
Image analysis of rock fragmentation is used in mines and quarries to control the quality of blasting. Obtained information is the particle-size-distribution curve relating volume-proportions to the sizes of fragments. Calculation by image analysis of this particle-size-distribution iscarried out in ...
Leto:
2008
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
The present paper develops a general methodology for the morphological segmentation of hyperspectral images, i.e., with an important number of channels. This approach, based on watershed, is composed of a spectral classification to obtain the markers and a vectorial gradient which gives the spatial ...
Leto:
2007
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
Transition aluminas, and especially the gamma type, are largely used as catalyst supports in refining and petrochemicals. Most studies focus on properties resulting from material texture and casting (specific surface, porous volume, pore shape and diameter). However, surface properties of alumina sh ...
Leto:
2009
Vir:
dLib.si Digitalna knjižnica Slovenije