Landmark-free geometric methods in biological shape analysis
نویسندگان
چکیده
منابع مشابه
Landmark-free geometric methods in biological shape analysis.
In this paper, we propose a new approach for computing a distance between two shapes embedded in three-dimensional space. We take as input a pair of triangulated genus zero surfaces that are topologically equivalent to spheres with no holes or handles, and construct a discrete conformal map f between the surfaces. The conformal map is chosen to minimize a symmetric deformation energy Esd(f) whi...
متن کاملA Landmark-Free Method for Three-Dimensional Shape Analysis
BACKGROUND The tools and techniques used in morphometrics have always aimed to transform the physical shape of an object into a concise set of numerical data for mathematical analysis. The advent of landmark-based morphometrics opened new avenues of research, but these methods are not without drawbacks. The time investment required of trained individuals to accurately landmark a data set is sig...
متن کاملMethods for shape analysis of landmark data from articulated structures
Landmark-based geometric morphometric methods are powerful tools in the study of size and shape. These methods allow one to describe the shape of rigid structures using a set of variables that can be used for statistical hypothesis testing, and to generate graphical representations of shape differences as deformations. However, when the landmarks chosen for an analysis span multiple rigid struc...
متن کاملGeometric estimates of heritability in biological shape.
The recently developed geometric morphometrics methods represent an important contribution of statistics and geometry to the study of biological shapes. We propose simple protocols using shape distances that incorporate geometric techniques into linear quantitative genetic models that should provide insights into the contribution of genetics to shape variation in organisms. The geometric approa...
متن کاملSize and shape analysis of two close Cyprinidae species (Garra variabilis-Garra rufa) by geometric morphometric methods
In this study, the shape and size differences between 30 samples of Garra rufa and Garra variabilis species captured in Tigris River were investigated by using geometric morphometric methods. According to the results of this study, there is no difference between these two species in terms of size (CS); however, they are quite different from each other in terms of shape and this difference is si...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of The Royal Society Interface
سال: 2015
ISSN: 1742-5689,1742-5662
DOI: 10.1098/rsif.2015.0795