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Browsing by Subject "PRASA 2010"

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Analysing co-articulation using frame-based feature trajectories

Author: Badenhorst, J ; Davel, MH ; Barnard, E Date: Nov 2010 The authors investigate several approaches aimed at a more detailed understanding of co-articulation in spoken utterances. They find that the Euclidean difference between instantaneous frame-based feature values and the mean values of these ... Read more
Consistency of cross-lingual pronunciation of South African personal names

Author: Kgampe, M ; Davel, MH Date: Nov 2010 The authors investigate the consistency with which speakers with different language profiles are able to pronounce personal names from Afrikaans, English, Setswana and isiZulu. They gather data in a controlled research study and analyse ... Read more
Estimating Target Orientation with a Single Camera for Use in a Human-Following Robot

Author: Burke, Michael G ; Brink, W Date: Nov 2010 This paper presents a monocular vision-based technique for extracting orientation information from a human torso for use in a robotic human-follower. Typical approaches to human-following use an estimate of only human position for navigation, ... Read more
Fast region-based object detection and tracking using correlation of features

Author: Senekal, F Date: Nov 2010 A new method for object detection using region based characteristics is proposed. The method uses correlation between features over a region as a descriptor for the region. It is shown that this region descriptor can be successfully applied ... Read more
Grasping objects from a user’s hand using time-of-flight camera data

Author: Govender, Natasha ; Claassens, J Date: Nov 2010 For a robotic platform to be able to assist/interact in human environments, the platform must be able to perform some fundamental tasks. This includes interacting with humans by grasping or releasing objects as or when required by the human. ... Read more
Influence of input matrix representation on topic modelling performance

Author: De Waal, A ; Barnard, E Date: Nov 2010 Topic models explain a collection of documents with a small set of distributions over terms. These distributions over terms define the topics. Topic models ignore the structure of documents and use a bag-of-words approach which relies solely ... Read more
Laser-based target tracking using principal component descriptors

Author: Burke, Michael G Date: Nov 2010 The reliable detection and tracking of general objects is required by many field robotics applications, where autonomous agents need to navigate between and interact with dynamic targets in unstructured environments. This paper presents an ... Read more
Optimizing tree-species classification in hyperspectal images

Author: Barnard, E ; Cho, Moses A ; Debba, Pravesh ; Mathieu, Renaud SA ; Wessels, Konrad J ; van Heerden, C ; Van der Walt, Christiaan M ; Asner, GP Date: Nov 2010 The authors investigate the classification of eight prominent savanna tree species, based on hyperspectral reflectance data. Although two principal components account for 95% of the variance of the data, up to 20 components are found to be ... Read more
Part-of-speech effects on text-to-speech synthesis

Author: Schlunz, Georg I ; Barnard, E ; Van Huyssteen, GB Date: Nov 2010 One of the goals of text-to-speech (TTS) systems is to produce natural-sounding synthesised speech. Towards this end various natural language processing (NLP) tasks are performed to model the prosodic aspects of the TTS voice. One of the ... Read more
Pronunciation modelling of foreign words for Sepedi ASR

Author: Modipa, T ; Davel, MH Date: Nov 2010 This study focuses on the effective pronunciation modelling of words from different languages encountered during the development of a Sepedi automatic speech recognition (ASR) system. While the speech corpus used for training the ASR system ... Read more
Refinement of falsified depth maps for the SwissRanger time-of-flight 3D camera on autonomous robots

Author: Osunmakinde, IO Date: Nov 2010 Robot navigation depends on accurate scene analysis by a camera using its data. This paper investigates a refinement of the inherent falsified depth maps generated from a 3D SwissRanger camera in the emission of beams of rays through a modulated ... Read more
Supporting drivable region detection by minimising salient pixels generated through robot sensors

Author: Falola, O ; Osunmakinde, I ; Bagula, A Date: Nov 2010 The role of robots, automatically guided machines able to perform tasks on their own cannot be over emphasized. In particular, if robotic vehicles are to work effectively, the way they are required to perform their jobs and their ability to ... Read more
Towards understanding the influence of SVM hyperparameters

Author: Van Heerden, CJ ; Barnard, E Date: Nov 2010 In this article, the authors investigate the relationship between SVM hyperparameters for linear and RBF kernels and classification accuracy. The process of finding SVM hyperparameters usually involves a gridsearch, which is both time-consuming ... Read more

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Browsing by Subject "PRASA 2010"

Browsing by Subject "PRASA 2010"

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All of ResearchSpace

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