Browsing Conference Publications by Subject "Pattern recognition"

Now showing items 1-20 of 23

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
Appropriate baseline values for HMM-based speech recognition

Author: Barnard, E ; Gouws, E ; Wolvaardt, K ; Kleynhans, N Date: Nov 2004 A number of issues realted to the development of speech-recognition systems with Hidden Markov Models (HMM) are discussed. A set of systematic experiments using the HTK toolkit and the TMIT database are used to elucidate matters such as the ... Read more
Binary naive Bayesian classifiers for correlated Gaussian features: a theoretical analysis

Author: Van Dyk, E ; Barnard, E Date: Nov 2008 We investigate the use of Naive Bayesian classifiers for correlated Gaussian feature spaces and derive error estimates for these classifiers. The error analysis is done by developing an exact expression for the error performance of a binary ... Read more
Channel normalization technique for speech recognition in mismatched conditions

Author: Kleynhans, N ; Barnard, E Date: Nov 2008 The performance of trainable speech-processing systems deteriorates significantly when there is a mismatch between the training and testing data. The data mismatch becomes a dominant factor when collecting speech data for resource scarce ... 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
Deep convolutional neural networks for dense non-uniform motion deblurring

Author: Cronje, J Date: Nov 2015 The work in this paper address the problem of removing non-uniform motion blur from a single image. The motion vector for an image patch is estimated by using a convolutional neural network (CNN). All the predicted motion vectors are combined ... Read more
Developing intonation corpora for isiXhosa and isiZulu

Author: Govender, Natasha ; Barnard, E ; Davel, M Date: Nov 2005 In order to bring the tools of statistical pattern recognition to bear on intonation modelling, we need tailor-made corpora in the languages of interest. We describe how two such corpora were developed (for isiZulu and isiXhosa, respectively). ... Read more
The effect of destination linked feature selection in real-time network intrusion detection

Author: Mzila, P ; Dube, E Date: Jul 2013 As internet usage rapidly increases in both private and corporate sectors, the study of network intrusion detection is continuously becoming more relevant and has thus been evolving substantially in recent years. One of the most interesting ... Read more
Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements

Author: De Villiers, J ; Wilson, F ; Nicolls, F Date: Nov 2011 A variety of lens distortion modelling techniques exist. Since they make use of different calibration metrics it is difficult to select one over the others. This work aims to compare lens distortion modelling techniques and calibration patterns ... Read more
Error analysis of a public domain pronunciation dictionary

Author: Martirosian, O ; Davel, M Date: Nov 2007 The authors explore pattern recognition techniques for verifying the correctness of a pronunciation lexicon, focusing on techniques that require limited human interaction. They evaluate the British English Example Pronunciation (BEEP) dictionary ... 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
Kernel bandwidth estimation for non-parametric density estimation: a comparative study

Author: Van der Walt, CM ; Barnard, E Date: Dec 2013 We investigate the performance of conventional bandwidth estimators for non-parametric kernel density estimation on a number of representative pattern-recognition tasks, to gain a better understanding of the behaviour of these estimators in ... Read more
The limitations of data perturbation for ASR of learner data in under-resourced languages

Author: Badenhorst, Jacob AC ; De Wet, Febe Date: Nov 2017 This paper reports on the recognition of second language (L2) isiXhosa speech produced by beginner level adult language learners. The speech samples were produced and recorded during the development of a Mobile Assisted Language Learning ... Read more
Measures for the characterisation of pattern-recognition data sets

Author: Van der Walt, Christiaan M ; Barnard, E Date: Nov 2007 The authors study the relationship between the properties of data and classifier performance. Data measures are employed to characterise classification problems and it is shown that these data measures successfully capture important characteristics ... Read more
Model based estimation for multi-modal user interface component selection

Author: Coetzee, L ; Viviers, I ; Barnard, E Date: Dec 2009 Multi-modal human computer interfaces are becoming increasingly widespread, building on more capable and affordable devices along with advances in helper applications utilising advanced pattern recognition. These interfaces promise to improve ... Read more
Obtaining a minimal set of rewrite rules

Author: Davel, M ; Barnard, E Date: Nov 2005 In this paper the authors describe a new approach to rewrite rule extraction and analysis, using Minimal Representation Graphs. This approach provides a mechanism for obtaining the smallest possible rule set – within a context-dependent rewrite ... Read more
Pattern recognition in service of people with disabilities

Author: Coetzee, L ; Barnard, E Date: Nov 2004 This paper analyses a number of disabilities, their assistive devices and the associated technologies in order to highlight the role pattern recognition plays in enabling accessibility and improving human computer interaction for people living ... Read more
The predictability of name pronunciation errors in four South African languages

Author: Kgampe, M ; Davel, MH Date: Nov 2011 Personal names are often pronounced in very different ways depending on the language background of the speaker. We seek to determine whether some of these pronunciations ‘errors’ are systematic and if so, in which ways. Specifically, we analyze ... 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
Radar transmitter classification using non-stationary signal classifier

Author: Du Plessis, MC ; Olivier, JC Date: Jul 2009 This paper presents a classification method which discriminates between two radar transmitters based on the received pulses. A simple radar transmitter model is presented to which a non-stationary signal classifier is applied. The classifier ... Read more

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Browsing Conference Publications by Subject "Pattern recognition"

Browsing Conference Publications by Subject "Pattern recognition"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect