Many real-world, scanned surfaces contain repetitive structures, like bumps, ridges, creases, and so on. We present a compression technique that exploits self-similarity within a point-sampled surface. Our method replaces similar surface patches with an instance of a representative patch. We use a concise shape descriptor to identify and cluster similar patches. Decoding is achieved through sim...

Abstract Fresnel diffraction dominated fields propagating at glancing angles in a wide planar and rectangular optical waveguides are considered. Both schemes are characterized numerically with multi-harmonic interaction. Resonant effect in terms of the energy gain versus geometry parameter is demonstrated. It is found that adjacent harmonics play a dominant role in the performance at short wave...

The commonly used solution for real-life 3D model representation is polygonal spatially consistent geometry, with texture, and, optionally, bump or displacement maps attached. Although the idea of displacement mapping is well known, there are just a few approaches to its efficient implementation. In this paper we present a technique that allows for efficient representation and rendering of real...

For more than a century, since the introduction of modern hernia repair by Basinni, technical aspects of hernia surgery have been surrounded by controversies. The purpose of this article is to examine these controversies with special attention to (a) mechanical versus degenerative nature of hernias, (b) traditional tissue approximation repair (tension repair) versus tension-free mesh repair, (c...

The surface wave losses in the patch antenna reduces the bandwidth and gain of the patch antenna. This problem is overcame by use of frequency selective surface. the FSS has a variety of applications in antennas. The FSS is constructed with periodic arrays of metallic patches of arbitrary geometries or slots within metallic screens. FSS geometries are designed by rings, square loops and fractal...

We present in this paper robust geometric feature estimators on the border of a possibly noisy discrete object. We introduce the notion of patch centered at a point of this border. Thanks to a width parameter, attached to a patch, the noise on the border of the discrete object can be considered, and an extended flat neighborhood of a border point is computed. Stable geometric features are then ...