Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Joachim Ohser"'
Publikováno v:
Journal of Mathematics in Industry, Vol 12, Iss 1, Pp 1-24 (2022)
Abstract Cloudiness or formation is a concept routinely used in industry to address deviations from homogeneity in nonwovens and papers. Measuring a cloudiness index based on image data is a common task in industrial quality assurance. The two most p
Externí odkaz:
https://doaj.org/article/57cbbbfe1ca940b08123f8df1f6b819f
Publikováno v:
Image Analysis and Stereology, Vol 39, Iss 1, Pp 33-46 (2020)
Random planar tessellations are presented which are generated by subsequent division of their polygonal cells. The purpose is to develop parametric models for crack patterns appearing at length scales which can change by orders of magnitude in areas
Externí odkaz:
https://doaj.org/article/c5d4cf9f3ecf41fcb8f5b583455d0c16
Publikováno v:
Image Analysis and Stereology, Vol 35, Iss 3, Pp 167-179 (2016)
Fibre reinforced composites constitute a relevant class of materials used chiefly in lightweight constructions for example in fuselages or car bodies. The spatial arrangement of the fibres and in particular their direction distribution have huge impa
Externí odkaz:
https://doaj.org/article/3ea7f70f0a2644ae9640588dd173ca83
Publikováno v:
Image Analysis and Stereology, Vol 35, Iss 2, Pp 81-91 (2016)
Curvature and torsion of three-dimensional curves are important quantities in fields like material science or biomedical engineering. Torsion has an exact definition in the continuous domain. However, in the discrete case most of the existing torsion
Externí odkaz:
https://doaj.org/article/45bbffa6ef984513bfd6974ce4ab3f1e
CHARACTERIZATION OF THE FORMATION OF FILTER PAPER USING THE BARTLETT SPECTRUM OF THE FIBER STRUCTURE
Publikováno v:
Image Analysis and Stereology, Vol 32, Iss 2, Pp 77-87 (2013)
The formation index of filter paper is one of the most important characteristics used in industrial quality control. Its estimation is often based on subjective comparison chart rating or, even more objective, on the power spectrum of the paper struc
Externí odkaz:
https://doaj.org/article/61c9bc5270ef46328789672d7818cec3
Publikováno v:
Image Analysis and Stereology, Vol 32, Iss 1, Pp 45-55 (2013)
A new method is presented for estimating the specific fiber length from 3D images of macroscopically homogeneous fiber systems. The method is based on a discrete version of the Crofton formula, where local knowledge from 3x3x3-pixel configurations of
Externí odkaz:
https://doaj.org/article/b444e1b0c45c4879affdcde05a77802f
Publikováno v:
Image Analysis and Stereology, Vol 30, Iss 3, Pp 123-131 (2011)
A large spatio-temporal data set monitoring the annual progress of bark beetle infestation in the Bavarian Forest National Park (Germany) is statistically analysed by means of complex image analysis algorithms. The infestation data were obtained by c
Externí odkaz:
https://doaj.org/article/c58a708c4ab1495e8aa27e2a3b6cf168
Publikováno v:
Image Analysis and Stereology, Vol 19, Iss 3, Pp 209-214 (2011)
Two methods for the estimation of number per unit volume NV of spherical particles are discussed: the (physical) disector (Sterio, 1984) and Saltykov's estimator (Saltykov, 1950; Fullman, 1953). A modification of Saltykov's estimator is proposed whic
Externí odkaz:
https://doaj.org/article/b97f12469c8e4219a069baa449205b29
Publikováno v:
Image Analysis and Stereology, Vol 27, Iss 2, Pp 73-78 (2011)
This paper presents a model of random tessellations that reflect several features of crack pattern. There are already several theoretical results derivedwhich indicate that thismodel can be an appropriate referencemodel. Some potential applications a
Externí odkaz:
https://doaj.org/article/01ea644fdf184c8191be45c076957010
Publikováno v:
Image Analysis and Stereology, Vol 28, Iss 2, Pp 77-92 (2011)
The densities of the intrinsic volumes – in 3D the volume density, surface density, the density of the integral of the mean curvature and the density of the Euler number – are a very useful collection of geometric characteristics of random sets.
Externí odkaz:
https://doaj.org/article/2e5d9ed97e3a4a7ab1591665eb6c6377