TY - GEN
A1 - Karbauskaite, Rasa
A1 - Dzemyda, Gintautas
A2 - Iacono, Mauro - ed.
A2 - Kołodziej, Joanna - ed.
PB - Zielona Góra: Uniwersytet Zielonogórski
N2 - One of the problems in the analysis of the set of images of a moving object is to evaluate the degree of freedom of motion and the angle of rotation. Here the intrinsic dimensionality of multidimensional data, characterizing the set of images, can be used. Usually, the image may be represented by a high-dimensional point whose dimensionality depends on the number of pixels in the image.
N2 - The knowledge of the intrinsic dimensionality of a data set is very useful information in exploratory data analysis, because it is possible to reduce the dimensionality of the data without losing much information. In this paper, the maximum likelihood estimator (MLE) of the intrinsic dimensionality is explored experimentally. In contrast to the previous works, the radius of a hypersphere, which covers neighbours of the analysed points, is fixed instead of the number of the nearest neighbours in the MLE.
N2 - A way of choosing the radius in this method is proposed. We explore which metric-Euclidean or geodesic-must be evaluated in the MLE algorithm in order to get the true estimate of the intrinsic dimensionality. The MLE method is examined using a number of artificial and real (images) data sets.
L1 - http://www.zbc.uz.zgora.pl/Content/79094/AMCS_2015_25_4_14.pdf
L2 - http://www.zbc.uz.zgora.pl/Content/79094
KW - multidimensional data
KW - intrinsic dimensionality
KW - maximum likelihood estimator
KW - manifold learning methods
KW - image understanding
T1 - Optimization of the maximum likelihood estimator for determining the intrinsic dimensionality of high-dimensional data
UR - http://www.zbc.uz.zgora.pl/dlibra/docmetadata?id=79094
ER -