The measure J in J value segmentation (JSEG) fails to represent the discontinuity of color, which degrades the robustness and discrimination of JSEG. An improved approach for JSEG algorithm was proposed for unsupervis...
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The measure J in J value segmentation (JSEG) fails to represent the discontinuity of color, which degrades the robustness and discrimination of JSEG. An improved approach for JSEG algorithm was proposed for unsupervised color-texture image segmentation. The texture and photometric invariant edge information were combined, which results in a discriminative measure for color-texture homogeneity. Based on the image whose pixel values are values of the new measure, region growing-merging algorithm used in JSEG was then employed to segment the image. Finally, experiments on a variety of real color images demonstrate performance improvement due to the proposed method.
Locality Preserving Projection (LPP), as a linear manifold learning algorithm, has attracted much interests in recent years. LPP considers an n1× n2image as a vector in €n1×n2space, and thus is limited by th...
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Fast incremental non Gaussian directional analysis (IPCA-ICA) is proposed as a linear technique for recognition [1]. The basic idea is to compute the principal components as sequence of image vectors incrementally, wi...
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A new class of quintic minimal surfaces with two shape parameters was proposed. We proved that the minimal surfaces were isothermal parameter surfaces and harmonic surfaces. The symmetry and the self-intersection prop...
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A new class of quintic minimal surfaces with two shape parameters was proposed. We proved that the minimal surfaces were isothermal parameter surfaces and harmonic surfaces. The symmetry and the self-intersection properties of the minimal surfaces were studied. We investigated the distributions of Gaussian curvature and hyperbolic points of these minimal surfaces, and analysised the effects of the two shape parameters through graphic examples. The control mesh representations of the minimal surfaces are given by tensor product Bézier surface and triangular Bézier surface. Finally, we presented their application in modeling of tensioned membrane structure. The result not only enriched the theory of minimal surface in differential geometry, but also enhanced the application of minimal surfaces in CAD systems.
This paper presents a new computational model for representing the Geographic Space concept, called Irregular Cellular Space, which main goal is supporting the development of multiscale spatially explicit dynamic mode...
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This paper presents a new computational model for representing the Geographic Space concept, called Irregular Cellular Space, which main goal is supporting the development of multiscale spatially explicit dynamic models integrated to geographical databases. This model has been implemented in a modeling software platform named TerraME which has been used for the development of some interesting environmental dynamic models and form simulation of dynamic spatial patterns of change.
My thesis aims to contribute towards building autonomous agents that are able to understand their surrounding environment through the use of both audio and visual information. To capture a more complete description of...
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Spline curve and surface play an important role in CAD and computer graphics. In this paper, we propose several extensions of cubic uniform B-spline. Then, we present the extensions of interpolating α-B-spline based ...
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Spline curve and surface play an important role in CAD and computer graphics. In this paper, we propose several extensions of cubic uniform B-spline. Then, we present the extensions of interpolating α-B-spline based on the new B-splines and the singular blending technique. The advantage of the extensions is that they have global and local shape parameters. Furthermore, we also investigate their applications in data interpolation and polygonal shape deformation.
In the space Γn=span {1, sin t, cos t, sinh t, cosh t, t, t2, , tn-4}, a kind of algebraic trigonometric hyperbolic basis called ATH Bezier basis is constructed by an integral approach. By the symmetry of the ATH Bez...
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In the space Γn=span {1, sin t, cos t, sinh t, cosh t, t, t2, , tn-4}, a kind of algebraic trigonometric hyperbolic basis called ATH Bezier basis is constructed by an integral approach. By the symmetry of the ATH Bezier basis, we construct an orthogonal basis called quasi-Lengendre basis, then we present the conversion formula between the ATH Bezier basis and the orthogonal basis. In addition, the optimal lower degree approximation of the ATH Bezier curves is investigated.
In recent years, iris recognition is becoming a very active topic in both research and practical applications. However, fake iris is a potential threat there are potential threats for iris-based systems. This paper pr...
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