Author:Luus, FPS; Van den Bergh, F; Maharaj, BTJDate:Jun 2014Multitemporal land-use analysis is becoming increasingly important for the effective management of Earth resources. Despite that, consistent differences in the viewing and illumination geometry in satellite-borne imagery introduce some issues ...Read more
Author:Salmon, BP; Holloway, DS; Kleynhans, Waldo; Olivier, JC; Wessels, Konrad JDate:Sep 2017In this paper, we propose a new method for extracting features from time-series satellite data to detect land cover change. We propose to make use of the behavior of a deterministic nonlinear system driven by a time-dependent force. The driving ...Read more
Author:Kunene, Dumisani C; Vadapalli, HDate:Sep 2017Human detection on static images remains a challenging research problem. This work evaluates the significance of using infrared imaging (IIR) over several human detection systems. Larger complexities arise when detecting people in colour ...Read more
Author:Cronje, JDate:Nov 2011A fast local image feature detector and descriptor that is implementable on the GPU is proposed. This method is the first GPU implementation of the popular FAST detector. A simple but novel method of feature orientation estimation which can ...Read more
Author:Joubert, DDate:Jul 2010SLAM, or simultaneous localization and mapping, is a key component in the development of truly independent robots. Vision-based SLAM utilising stereo vision is a promising approach to SLAM but it is computationally expensive and difficult to ...Read more
Author:Luus, FPS; Van den Bergh, F; Maharaj, BTJDate:Jun 2013Settlement classifiers for multitemporal satellite image analysis have to overcome numerous difficulties related to across-date variances in viewing- and illumination geometry. Shadow anisotropy is a prominent contributing factor in classifier ...Read more
Author:Mdakane, Lizwe W; Kleynhans, WDate:Oct 2020Oil spills are often caused by vessels when dumping oily bilge wastewater at sea (also referred to as bilge dumping). In an synthetic aperture radar (SAR) image, oil spills dampen the radar energy return and appear as linearly shaped dark ...Read more
Author:Mngenge, NA; Nelufule, Nthatheni; Nelwamondo, Fulufhelo V; Msimang, MDate:Nov 2012Automatic Fingerprint Recognition Systems (AFRSs) rely on minutiae position and orientation within the fingerprint image for matching. Minutiae information is highly accurate provided that the fingerprint image matched is of high quality. ...Read more
Author:Mabuza-Hocquet, Gugulethu P; Nelwamondo, Fulufhelo VDate:Dec 2015Iris recognition uses automated techniques to extract iris features which are stored in a database as a feature template to be later used for individual identification and authentication. Strict image quality control is a basic requirement ...Read more
Author:Toudjeu, IT; Van Wyk, BJ; Van Wyk, MA; Van Den Bergh, FDate:Jun 2008Traditionally, granulometries are obtained using a series of openings or closings with convex structuring elements of increasing size. Granulometries constitute a useful tool for texture and image analysis since they are used to characterize ...Read more
Author:Mdakane, Lizwe W; Kleynhans, Waldo; Schwegmann, Colin P; Meyer, Rory GVDate:Jul 2017Oil spills present a major threat to the sea ecosystem and thus need to be monitored on a regular basis. Synthetic Aperture Radar (SAR) data is well known for ocean monitoring capabilities. SENTINEL 1 (SEN1) extra wide (EW) mode data and ...Read more
Author:Brown, Dane; Bradshaw, KDate:May 2016The traditional texture-based fingerprint recognition system known as FingerCode is improved in this work. Texture-based fingerprint recognition methods are generally more accurate than other methods, but at the disadvantage of increased ...Read more
Author:Luus, FPS; Van den Bergh, F; Maharaj, BTJDate:Jul 2013Classifier-generic domain adaptation based on feature space matching is applied in this study, with the aim of correcting dataset shifts consisting of both covariate and concept shifts. The feature space transformation between training and ...Read more
Author:Van Wyk, BJ; Van Wyk, MA; Van Den Bergh, FDate:Jun 2007The concept of an Image Difference Spectrum, a novel tool for the extraction of global image information, is introduced. It is shown that Image Difference Spectra are fast alternatives to granulometric curves, also referred to as pattern ...Read more
Author:Matsebe, O; Namoshe, M; Tlale, NDate:Jul 2010Simultaneous Localisation and Mapping (SLAM) is a process by which a mobile robot maps the environment and concurrently localises itself within the map. Feature extraction is a technique by which sensor data is processed to obtain well defined ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJ; Naicker, K; Steyn, J; Alanazi, T; Alzamil, ADate:Apr 2011This paper describes the design and working principles of an experimental multimode radar with a stepped-frequency Synthetic Range Profiling (SRP) and Inverse Synthetic Aperture Radar (ISAR) capability for the purpose of operator-based ...Read more