Large terrain databases require a great number of polygons and textures. In consequence, transmission of terrain data over slow networks is still worrying. Multiresolution models allow progressive transmission, that is, the transmission of a simple model followed by successive refinements. In this work we describe a new multiresolution model called Geometric-Textured Bitree (GTB) that enables p...

A view-dependent multiresolution triangulation algorithm is presented for a real-time flythrough. The triangulation of the terrain is generated incrementally onthe-fly during the rendering time. We show that since the view changes smoothly only a few incremental modifications are required to update the triangulation to a new view. The resulting triangles form a multiresolution Delaunay triangul...

We show that translations and dilations of a p–adic wavelet coincides (up to the multiplication by some root of one) with a vector from the known basis of discrete p–adic wavelets. In this sense the continuous p–adic wavelet transform coincides with the discrete p–adic wavelet transform. The p–adic multiresolution approximation is introduced and relation with the real multiresolution approximat...

Digital steganography or data hiding has emerged as a new area of research in connection to the communication in secured channel as well as intellectual property protection for multimedia signals. The redundancy in image representation can be exploited successfully to embed specified characteristic information with a good quality of imperceptibility. The hidden multimedia information will be co...

v CHAPTER

The motivation behind this work was to analyze the attitude of the journalist through his 5 serial articles, concerning the local referendum about the construction of nuclear power station, which had written after having interviewed in 4 areas. The articles were composed by his description and the opinion of interviewers: supporters, objectors and others. Employing a mathematical method, the an...

A multiresolution analysis system for interpreting digital mammograms is proposed and tested. This system is based on using fractional amount of biggest wavelets coefficients in multilevel decomposition. A set of real labeled database is used in evaluating the proposed system. The evaluation results show that the system has a remarkably high efficiency compared by other systems known till prese...

Suppose a real-valued function φ ∈ L2(R) satisfies the following conditions: (a) φ̂(2ω) = m0(ω)φ̂(ω), where m0 is an essentially bounded 2π -periodic function; and (b) limω→0 φ̂(ω) = (2π)−1/2; then the function φ is called refinable or scaling, m0 is called a symbol of φ, and the relation in item (a) is called a refinement equation. Every refinable function generates multiresolution analysis (MRA)...

Modeling and rendering of trees has recently received a lot of attention. Models have been developed that allow photorealistic rendering of trees at interactive frame rates. However, little attention has been devoted to expressive rendering of these models. In this work we present a multiresolution model designed specifically to speed up painterly rendering of trees. Our method proposes a novel...