Naslov
Granulometric roundness parameter determined on model and natural sediment grains, suggested as a possible sphericity index

Autori
Balagurunathan, Yoganand ; Frančišković-Bilinski, Stanislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MATH/CHEM/COMP 2004 Program & Book of Abstracts / Graovac, A. ; Pokrić, B. ; Smrečki, V. - Zagreb, 2004, 3-3

Skup
MATH/CHEM/COMP 2004, The 19-th Dubrovnik International Course & Conference on the interfaces among mathematics, chemistry and computer sciences

Mjesto i datum
Dubrovnik, Hrvatska, 21.06.2004. - 26.06.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
morphological granulometric analysis; granulometric roundness; Wadell's sphericity; digital granulometries; shape analysis

Sažetak
Present research in progress is a continuation of our recent studies on morphological granulometric analysis of sediment images (Balagurunathan et al., 2001) and of real siliceous and calcareous estuarine and marine sediments (Frančišković-Bilinski et al., 2003). The first preliminary attempt to compare granulometric roundness with Wadell's sphericity and roundness was reported on very few simulated and real imaged calcareous marine sediment grains (Bilinski et al., 2003). Digital granulometries has been traditionally used for shape analysis and its size distributions or the pattern spectrum and its moments form good shape descriptors. These features find applications in shape characterization, classification and parameter estimation. We propose to use granulometric roundness parameter, which is defined as the ratio of pattern spectrum variability to its mean all with respect to a circular reference shape (structuring element). As the shapes deviates from circularity the pattern spectrum shows a larger spread in its density function and the amount of spread is related to the deviation from perfect circular shape. These measures, along with conventional shape features, could be latter used to predict the conventional measures. In our current work we present results of proposed granulometric roundness measure, compared with the conventional Wadell's measures. This comparison is carried out for few simulated and real imaged grain samples taken along Soča River (Slovenia). The digital methods for granulometric roundness measure are faster and accurate. They can be suggested as possible sphericity index in sedimentary research. LITERATURE: Balagurunathan, Y., Dougherty, E.R., Frančišković-Bilinski, S., Bilinski, H. and Vdović, N. (2001): Morphological granulometric analysis of sediment images. Image Analysis and Stereology 20, 87-99. Frančišković-Bilinski, S., Bilinski, H., Vdović, N., Balagurunathan, Y. and Dougherty, E.R. (2003): Application of image-based granulometry to siliceous and calcareous estuarine and marine sediments. Estuarine Coastal and Shelf Science 58(2), 227-239. Bilinski, H., Frančišković-Bilinski, S., Balagurunathan, Y. and Dougherty, E.R. (2003): Determination of Wadell's sphericity of sediment grains in comparison with granulometric circularity measure. 22nd IAS Meeting of Sedimentology - Opatija 2003 Abstracts book, Vlahović Igor (Editor), Zagreb 2003, p.15.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA