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Interactive exploration of uncertainty in fuzzy classifications by isosurface visualization of class clusters


Lucieer, A and Veen, L, Interactive exploration of uncertainty in fuzzy classifications by isosurface visualization of class clusters, International Journal of Remote Sensing, 30, (18) pp. 4685-4705. ISSN 0143-1161 (2009) [Refereed Article]

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DOI: doi:10.1080/01431160802651942


Uncertainty and vagueness are important concepts when dealing with transition zones between vegetation communities or land-cover classes. In this study, classification uncertainty is quantified by applying a supervised fuzzy classification algorithm. New visualization techniques are proposed and presented in order to come to a better understanding of the relationship between uncertainty in the spatial extent of image classes and their thematic uncertainty. The thematic extent of a class is visualized as a three-dimensional (3D) class cluster shape in a feature-space plot, and the spatial extent of the class is highlighted in an image display based on a user-defined uncertainty threshold. Changing this threshold updates both visualizations, showing the effect of uncertainty on the spatial extent of a class and its shape in feature space. Spheres, ellipsoids, convex hulls, -shapes and isosurfaces are compared for visualization of 3D class clusters. Isosurfaces are implemented to facilitate real-time rendering and interaction with class clusters in feature space. The visualization tool is illustrated with a fuzzy classification of a Quickbird image of Macquarie Island, one of the unique sub-Antarctic World Heritage Areas that is characterized by vegetation transition zones. This study shows that visualization techniques are valuable for the interpretation and exploration of image classification results and associated uncertainty.

Item Details

Item Type:Refereed Article
Keywords:Uncertainty; Isosurface;Class clusters; Sub Antarctic Islands
Research Division:Engineering
Research Group:Geomatic engineering
Research Field:Photogrammetry and remote sensing
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Assessment and management of coastal and estuarine ecosystems
UTAS Author:Lucieer, A (Professor Arko Lucieer)
ID Code:54604
Year Published:2009
Web of Science® Times Cited:1
Deposited By:Geography and Environmental Studies
Deposited On:2009-02-25
Last Modified:2010-04-13
Downloads:276 View Download Statistics

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