نتایج جستجو برای: stochastic fractal search

تعداد نتایج: 441909  

2012
Sugandha Sharma

Compression and decompression tools of digital image has become a significant aspect in the storing and transferring of digital image. Fractal image compression technique is recently used to compress images. The main problem with fractal image compression is that it takes a lot of computational time for searching blocks (domain block and range block) and then compares these blocks. There are ma...

Journal: :SIAM Review 2004
Tilmann Gneiting Martin Schlather

Fractal behavior and long-range dependence have been observed in an astonishing number of physical, biological, geological, and socio-economic systems. Time series, profiles, and surfaces have been characterized by their fractal dimension, a measure of roughness, and by the Hurst coefficient, a measure of long-memory dependence. Either phenomenon has been modeled and explained by self-affine ra...

Journal: :Europan journal of science and technology 2022

Robot navigasyonunun en önemli bileşenlerinden biri olan yol planlama son yıllarda da araştırmacılar tarafından kapsamlı bir şekilde incelenmekte ve bu problem için birçok farklı metasezgisel algoritma kullanılmaktadır. Bu çalışmada ızgara tipi ortamda mobil robotun küresel planlaması ele alınmış matematik tabanlı algoritmalarının etkileri incelenmiştir. Öncelikle tipinde zorluk derecelerinde ü...

Journal: :Results in physics 2021

The Kardar-Parisi-Zhang (KPZ) equation has been connected to a large number of important stochastic processes in physics, chemistry and growth phenomena, ranging from classical quantum physics. central quest this field is the search for ever more precise universal exponents. Notably, exact exponents are only known $1+1$ dimensions. In work, we present physical geometric analytical methods that ...

Journal: :Bulletin of mathematical biology 2004
Matthew He

In this paper we construct three primitive mappings based on three kinds of genetic attribute equivalences. We then apply the mappings and basic addition operation to the universal genetic code to generate three square matrices. We show that these square matrices are stochastic in nature. They demonstrate some fractal similarity properties and resemble the similar properties to the original sto...

Journal: :IEEE Trans. Signal Processing 1999
Brendt Wohlberg Gerhard de Jager

Fractal image compression is based on the rather poorly motivated assumption that “natural” images exhibit significant affine self-similarity. The accuracy of this assumption is evaluated by a comparison between the statistics of natural images and those of a multiresolution stochastic model designed to generate images exhibiting affine self-similarity as assumed by fractal coding techniques. T...

2006
I. S. Molchanov

The paper suggests a generalisation of the diffusion-limited aggregation (DLA) based on using a general stochastic process to control particle movements before sticking to a growing cluster. This leads to models with variable characteristics that can provide a single framework for treating a number of earlier models of fractal growth: the DLA, the Eden model and the ballistic aggregation. Addit...

2004
Daniel W. Bruhn John Franke

2005
Ping-Sung Liao Chun-Chi Chen Jeng-Shyang Pan

In this study, a novel fractal watermarking is proposed to enforce the robustness of data hiding against possible attack. The proposed fractal watermarking is mixed of three different approaches: inner/exterior search space, odd/even search space, and two classes of isometric search space. During watermark extraction, the watermark bit is always determined by the result of a voting mechanism on...

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