Hendrik De Villiers

Hendrik De Villiers
Wageningen University & Research | WUR · Wageningen Food & Biobased Research

PhD

About

13
Publications
9,232
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141
Citations
Additional affiliations
May 2014 - April 2016
Stellenbosch University
Position
  • Lecturer

Publications

Publications (13)
Article
Full-text available
Virus diseases are of high concern in the cultivation of seed potatoes. Once found in the field, virus diseased plants lead to declassification or even rejection of the seed lots resulting in a financial loss. Farmers put in a lot of effort to detect diseased plants and remove virus-diseased plants from the field. Nevertheless, dependent on the cul...
Conference Paper
Full-text available
Unsupervised pre-training of neural networks has been shown to act as a regularization technique, improving performance and reducing model variance. Recently, fully convolutional networks (FCNs) have shown state-of-the-art results on various semantic segmentation tasks. Unfortunately, there is no efficient approach available for FCNs to benefit fro...
Conference Paper
Full-text available
Procedural texture generation enables the creation of more rich and detailed virtual environments without the help of an artist. However, finding a flexible generative model of real world textures remains an open problem. We present a novel Convolutional Neural Network based texture model consisting of two summary statistics (the Gramian and Transl...
Conference Paper
Full-text available
Convolutional neural networks have shown great promise in both general image segmentation problems as well as bioimage segmentation. In this paper, the application of different convolutional network architectures is explored on the C. elegans live/dead assay dataset from the Broad Bioimage Benchmark Collection. These architectures include a standar...
Data
Supplementary materials for currently in review paper Graphical Models for Colour Calibration in Glove-based Hand Tracking
Thesis
Full-text available
A sign language tutoring system capable of generating detailed context-sensitive feedback to the user is presented in this dissertation. This stands in contrast with existing sign language tutor systems, which lack the capability of providing such feedback. A domain specific language is used to describe the constraints placed on the user’s movement...
Article
Full-text available
Vision-based hand pose estimation presents unique challenges, particularly if high-fidelity reconstruction is desired. Searching large databases of synthetic pose candidates for items similar to the input offers an attractive means of attaining this goal. The earth mover's distance is a perceptually meaningful measure of dissimilarity that has show...
Conference Paper
Full-text available
Hand posture reconstruction systems based on large databases of synthetically rendered images of a 3D hand model offer a simple and flexible means of exploiting domain knowledge to provide training data. Such systems may also be applied to other domains in the posture reconstruction field by changing the model under consideration. Typically, the in...
Thesis
Full-text available
This thesis is concerned with the fabrication of high temperature bi-epitaxial grain boundary Josephson junctions for use in superconducting microelectronic circuits. It aims to provide a proof-of-concept manufacturing process which can serve as a basis for future research at the University of Stellenbosch. The work in this thesis integrates and e...
Conference Paper
Full-text available
A swarm is a decentralized, autonomous multi-agent system consisting of many simple, cooperative agents which behave according to simple rules and use local information in a common environment to achieve global goals. Swarm intelligence attempts to design algorithms or distributed problem solving devices inspired by the collective behaviour of soci...

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