@inproceedings{15a0d32bf19a4d82a0732cd328fd4a3a,
title = "Qualitative assessment of surface roughness of limestone specimens from the orientation of unwrapped triangulated point clouds",
abstract = "Weathering reduces both the strength and stiffness of rock. Since weathering is a surface phenomenon it can be assessed using surface imaging techniques. The surface roughness of twelve cylindrical limestone specimens from Florida were assessed using analysis of close-range photogrammetry. Dense point clouds produced from the specimens were unwrapped and triangulated using Delaunay triangulation. Outward normal facing vectors were computed for each triangle and the γ-values were assessed. Smooth surfaces had lower average γ-values and lower standard deviations than rough surfaces. Surface roughness could easily be distinguished using lognormal probability density functions based on average and standard deviation of the γ-values. For smooth specimens, histograms of γ-values were similar to the probability density functions. However, for rough specimens the histograms of γ-values were not similar to the probability density functions. The histograms for the roughest specimens showed a bimodal distribution of values with peaks at both the low and high ends of the histograms.",
keywords = "Photogrammetry, Point cloud, Surface roughness, γ-value",
author = "Andrew Bliss and Nick Hudyma and Stephanie Brown and Joshua Oglesby and Alan Harris",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; IEEE SoutheastCon 2017 ; Conference date: 30-03-2017 Through 02-04-2017",
year = "2017",
month = may,
day = "10",
doi = "10.1109/SECON.2017.7925385",
language = "English",
series = "Conference Proceedings - IEEE SOUTHEASTCON",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "IEEE SoutheastCon 2017",
}