We propose a new automatic method for generatingLODs of a given polygonal model that is based on edgecollapse simplification operation and exploits a variant ofmultiple choice optimization (MCO) framework [20]. Inan edge collapse algorithm, the way how ...

When matching regions from "similar" images, one typically has the problem of missing counterparts due to local or even global variations of segmentation .neness. Matching segmentation hierarchies, however, not only increases the chances of finding counterparts, ...

We present a multiresolution model for terrain surfaces which is able to handle large-scale global topographic data. It is based on a hierarchical decomposition of the sphere by a recursive bisection triangulation in geographic coordinates. Error indicators ...

Recently, the generative modeling approach to video segmentation has been gaining popularity in the computer vision community. For example, the flexible sprites framework has been studied in, among other references, [11,13,14,24]. In general, detailed ...

The boundary based image segmentation and representation system developed by Nobors and Ranganath has been found suitable for a wide range of image interpretation applications [10]. The segmentation system receives a thinned edge image as input and outputs ...

Visual attention analysis provides an alternative methodology to semantic image understanding in many applications such as adaptive content delivery and region-based image retrieval. In this paper, we propose a feasible and fast approach to attention ...

Detecting the dominant normal directions to the decisionsurface is an established technique for feature selectionin high dimensional classification problems. Several approacheshave been proposed to render this strategy moreamenable to practice, but they ...

We develop an integrated, probabilistic model for the appearance and three-dimensional geometry of cluttered scenes. Object categories are modeled via distributions over the 3D location and appearance of visual features. Uncertainty in the number of ...

Developing suitable feature representation and similarity algorithms is still a challenging problem in shape retrieval system. In this paper, we have proposed an invariant feature representation for shape-based image indexing and retrieval. Using an ...

Radial, space-filling (RSF) techniques for hierarchy visualization have several advantages over traditional node-link diagrams, including the ability to use the display space efficiently while effectively conveying the hierarchy structure. Several RSF ...

Visualizing large uncorrelated point data sets with regular volume rendering produces unsatisfying results due to low spatial resolution. For time-dependent data, available main memory can be a limiting factor as well. To deal with these large time-varying ...

A new approach to automatically extract the main features in color fundus images are proposed in this paper. Optic disk is localized by the principal component analysis (PCA) and its shape is detected by a modified active shape model (ASM). Exudates ...

Ensuring the integrity of a digital video is animportant and challenging research problem arising outof many video applications. In this paper, we present ahierarchical framework for video authentication based oncryptographic secret sharing that protects ...