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The Design and Analysis of Graphical Passwords
This work proposes and evaluates new graphical password schemes that exploit features of graphical input displays to achieve better security than text-based passwords and describes the prototype implementation of one of the schemes on a personal digital assistants (PDAs) namely the Palm PilotTM. Expand
Shape Analysis of Elastic Curves in Euclidean Spaces
This paper introduces a square-root velocity (SRV) representation for analyzing shapes of curves in euclidean spaces under an elastic metric and demonstrates a wrapped probability distribution for capturing shapes of planar closed curves. Expand
Globally Optimal Regions and Boundaries as Minimum Ratio Weight Cycles
  • I. Jermyn, H. Ishikawa
  • Computer Science, Mathematics
  • IEEE Trans. Pattern Anal. Mach. Intell.
  • 1 October 2001
A new form of energy functional is described that is defined on the space of boundaries in the image domain and can incorporate very general combinations of modeling information both from the boundary and from the interior of the region. Expand
A Novel Representation for Riemannian Analysis of Elastic Curves in Rn
A novel representation of continuous, closed curves in Rn that is quite efficient for analyzing their shapes and presents a fast algorithm for finding geodesies in shape spaces using the elastic metric and path-straightening methods. Expand
A study of Gaussian mixture models of color and texture features for image classification and segmentation
The aims of this paper are two-fold: to define Gaussian mixture models (GMMs) of colored texture on several feature spaces and to compare the performance of these models in various classificationExpand
Riemannian Analysis of Probability Density Functions with Applications in Vision
A "spherical" version of the Fisher-Rao metric is proposed that provides closed-form expressions for geodesies and distances, and allows fast computation of sample statistics and an application in planar shape classification is presented. Expand
Higher Order Active Contours
A new class of active contour models that hold great promise for region and shape modelling are introduced, and a special case of these models are applied to the extraction of road networks from satellite and aerial imagery. Expand
Globally optimal regions and boundaries
  • I. Jermyn, H. Ishikawa
  • Mathematics, Computer Science
  • Proceedings of the Seventh IEEE International…
  • 20 September 1999
A new form of energy functional for the segmentation of regions in images, and an efficient method for finding its global optima, which can have contributions from both the region and its boundary, is proposed. Expand
Gaussian mixture models of texture and colour for image database retrieval
We introduce Gaussian mixture models of 'structure' and colour features in order to classify coloured textures in images, with a view to the retrieval of textured colour images from databases.Expand
Elastic Shape Matching of Parameterized Surfaces Using Square Root Normal Fields
This paper defines a new methodology for shape analysis of parameterized surfaces, and introduces a novel representation of surfaces termed square root normal fields or SRNFs, which results in more natural shape matchings and has some theoretical advantages over previous methods. Expand