Active and non-active porosity in concrete. Part II: Evaluation of existing models

Edge strength functions as shape priors in image segmentation Erdem, Erkut; Erdem, Aykut; Tarı, Zehra Sibel (2005-12-01) Many applications of computer vision requires segmenting out of an object of interest from a given image. Motivated by unlevel-sets formulation of Raviv, Kiryati and Sochen [8] and statistical formulation of Leventon, Grimson and Faugeras [6], we present a new image segmentation method which accounts for prior shape information. Our method depends on Ambrosio-Tortorelli approximation of Mumford-Shah functional. The prior shape is represented by a by-product of this functional, a smooth edge indicator functi...
Image segmentation with unified region and boundary characteristics within recursive shortest spanning tree Esen, E.; Alp, Y. K. (2007-06-13) The lack of boundary information in region based image segmentation algorithms resulted in many hybrid methods that integrate the complementary information sources of region and boundary, in order to increase the segmentation performance. In compliance with this trend, we propose a novel method to unify the region and boundary characteristics within the canonical Recursive Shortest Spanning Tree algorithm. The main idea is to incorporate the boundary information in the distance metric of RSST with minor cha...
Active and non-active porosity in concrete. Part I: Experimental evidence Yaman, İsmail Özgür; Aktan, H.M. (Springer Science and Business Media LLC, 2002-03-01) The findings of an experimental study are described, documenting and quantifying the influence of concrete porosity on its mechanical properties in saturated and dry states. Concrete porosity consists of capillary and entrained air, and described respectively as active and non-active, depending on its influence on mechanical properties with changing moisture state. It was found that the active (capillary) porosity influence on mechanical properties is more pronounced with decreasing moisture. The influence ...
NonLocal via Local-NonLinear via Linear: A New Part-coding Distance Field via Screened Poisson Equation Genctav, Murat; Genctav, Asli; Tarı, Zehra Sibel (2016-06-01) Interesting phenomena in shape perception is nonlocal and nonlinear. Thus, it is crucial that a shape perception system exhibits a nonlocal and nonlinear behaviour. From the computational point of view, however, neither nonlinearity nor nonlocality is desired. We propose a repeated use of Screened Poisson PDE (leading to a sparse linear system) to compute a part coding and extracting distance field, a mapping from the shape domain to the real line. Despite local and linear computations, the field exhibits h...
Video Content Analysis Using Dominant Sets Sakarya, Ufuk; TELATAR, ZİYA (2009-04-11) In this paper, a graph-based method for video content analysis is proposed The characteristics of the detected shots are investigated for news, commercial, animated cartoon, basketball and documentary videos and experimental studies are realized on these videos. The maximum clique on the weighted and undirected graph, which is constructed according to visual content, is tried being detected. it is inferred that specially in news and commercials, the proposed method can be used for temporal video segmentation.

Citation Formats

İ. Ö. Yaman and N. Hearn, “Active and non-active porosity in concrete. Part II: Evaluation of existing models,” Materials and Structures/Materiaux et Constructions, pp. 110–116, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33143.