Search Results for author: Vasil Kolev

Found 9 papers, 0 papers with code

Bauer's Spectral Factorization Method for Low Order Multiwavelet Filter Design

no code implementations9 Dec 2023 Vasil Kolev, Todor Cooklev, Fritz Keinert

Convergence rates of the two numerical algorithms are investigated for a number of singular and nonsingular scalar and matrix polynomials taken from different areas.

Assessing of Soil Erosion Risk Through Geoinformation Sciences and Remote Sensing -- A Review

no code implementations12 Oct 2023 Lachezar Filchev, Vasil Kolev

During past decades a marked manifestation of widespread erosion phenomena was studied worldwide.

Wavelet Coherence Of Total Solar Irradiance and Atlantic Climate

no code implementations3 May 2023 Vasil Kolev, Yavor Chapanov

The oscillations of climatic parameters of North Atlantic Ocean play important role in various events in North America and Europe.

Time Series

Challenges and Solutions for Utilizing Earth Observations in the "Big Data" era

no code implementations19 Aug 2021 Lachezar Filchev, Lyubka Pashova, Vasil Kolev, Stuart Frye

The ever-growing need of data preservation and their systematic analysis contributing to sustainable development of the society spurred in the past decade, numerous Big Data projects and initiatives are focusing on the Earth Observation (EO).

Earth Observation

Design of a Simple Orthogonal Multiwavelet Filter by Matrix Spectral Factorization

no code implementations16 Oct 2019 Vasil Kolev, Todor Cooklev, Fritz Keinert

We consider the design of an orthogonal symmetric/antisymmetric multiwavelet from its matrix product filter by matrix spectral factorization (MSF).

Singular Value Decomposition of Images from Scanned Photographic Plates

no code implementations7 Oct 2013 Vasil Kolev, Katya Tsvetkova, Milcho Tsvetkov

We want to approximate the mxn image A from scanned astronomical photographic plates (from the Sofia Sky Archive Data Center) by using far fewer entries than in the original matrix.

Image Compression

Compressed sensing of astronomical images:orthogonal wavelets domains

no code implementations27 Nov 2011 Vasil Kolev

A simple approach for orthogonal wavelets in compressed sensing (CS) applications is presented.

Image Compression

Multiplierless Modules for Forward and Backward Integer Wavelet Transform

no code implementations19 Oct 2010 Vasil Kolev

This article is about the architecture of a lossless wavelet filter bank with reprogrammable logic.

Orthogonal multifilters image processing of astronomical images from scanned photographic plates

no code implementations22 Jul 2010 Vasil Kolev

In this paper orthogonal multifilters for astronomical image processing are presented.

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