Publications
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New bandwidth selection criterion for Kernel PCA : Approach to dimensonality reduction and classification KU Leuven
BACKGROUND: DNA microarrays are potentially powerful technology for improving diagnostic classification, treatment selection, and prognostic assessment. The use of this technology to predict cancer outcome has a history of almost a decade. Disease class predictors can be designed for known disease cases and provide diagnostic confirmation or clarify abnormal cases. The main input to this class predictors are high dimensional data with many ...
3D face recognition using point cloud kernel correlation KU Leuven
3D Face recognition is a widely researched problem for wich many methods have been proposed. Unfortunately, most of these methods need vast prior knowledge in the form of large 3D face training sets. Also, many methods need point correspondences, wich are hard to obtain. In this paper, we present a general 3D face recognition method based on point cloud kernel correlation and kernel density estimation for registration, which doesn't make use of ...
Application of Density Analysis for Landmine Risk Mapping Vrije Universiteit Brussel
One of the primary challenges of Mine Action Programs is organizing and analysing the vast amounts of landmine incidents information required to make informed policy decisions for implementing Mine Action Activities, such as victim assistance, landmine impact, landmine clearance, etc. With this in mind, this study aimed at mapping the special distribution of landmine incidents via a combination of Geographic Information System (GIS) and spatial ...
A qualitative study of probability density visualization techniques in measurements Vrije Universiteit Brussel
Engineers find interpreting plots of a measured physical variable more straightforward than doing a formal statistical analysis. The default choice to display the data behavior is the histogram. The histogram’s performance has proved to be sufficient. However, histograms have a number of limitations including sensitivity to the binwidth and a non-physical roughness. Over the past years, statisticians have developed different techniques to ...
A Guaranteed Blind and Automatic Probability Density Estimation of Raw Measurements Vrije Universiteit Brussel
The use of the histogram to characterize the random component in raw measurements is widely known, applied and applauded. However, its correct use to show the features hidden in the data may require some caution and insight. The most important degree of freedom specified by the user is the binwidth. Although standard rules for binwidth selection exist, they offer no guarantees that the histogram reveals all the desired features. Furthermore, the ...
Eliminating user-interaction in probability density estimation Vrije Universiteit Brussel
Although the extensive literature, describing the probability content of measurements remains an important topic for engineering problems. The histogram remains the golden standard, even though kernel density estimation is a strong competitor when smooth estimates are desired. Critical user interaction is required for both the use of histograms and kernel densities. A good choice for the bandwidth is essential in both cases. On top of that the ...
Nonparametric Probability Density Estimation via Interpolation Filtering Vrije Universiteit Brussel
In this paper, we discuss nonparametric estimation of the probability density function (PDF) of a univariate random variable. This problem has been the subject of a vast amount of scientific literature in many domains, while statisticians are mainly interested in the analysis of the properties of proposed estimators, and engineers treat the histogram as a ready-to-use tool for a data set analysis. By considering histogram data as a numerical ...
Population density, habitat use and activity patterns of endangered hog deer in Cambodia University of Antwerp
Hog deer (Axis porcinus) were once widespread throughout much of lowland Southern Asia, but numbers rapidly declined during the last two decades. In Cambodia, the species was considered extinct until 2006 when a small number of individuals (presumedly spp. annamiticus) was rediscovered along the western bank of the Mekong River, near Kratie. Since reliable data on this population are lacking, we conducted two camera trap surveys to investigate ...
Is access to alcohol associated with alcohol/substance abuse among people diagnosed with anxiety/mood disorder? University of Antwerp
Objectives: To investigate the relationship between access to off-license alcohol outlets and areas with dual treatment for alcohol/drug abuse and anxiety/mood disorder compared to areas with anxiety/mood disorder only in an urban setting in New Zealand. Study design: Ecologic study. Methods: Within small areas (2840 meshblocks, mean size 0.05 km(2)) in the city of Auckland, New Zealand, counts of adults receiving anxiety/mood disorder treatment ...