6 citations · 20 across the 7 of their papers we have counts for
8 papers
Assessing of Soil Erosion Risk Through Geoinformation Sciences and Remote Sensing -- A Review
Lachezar Filchev, Vasil Kolev
During past decades a marked manifestation of widespread erosion phenomena was studied worldwide. Global conservation community has launched campaigns at local, regional and contin…
Challenges and Solutions for Utilizing Earth Observations in the "Big Data" era
Lachezar Filchev, Lyubka Pashova, Vasil Kolev +1
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 project…
Design of a Simple Orthogonal Multiwavelet Filter by Matrix Spectral Factorization
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). As a test problem, we construct…
Matrix Spectral Factorization for SA4 Multiwavelet
Vasil Kolev, Todor Cooklev, Fritz Keinert
In this paper, we investigate Bauer's method for the matrix spectral factorization of an r-channel matrix product filter which is a halfband autocorrelation matrix. We regularize t…
Singular Value Decomposition of Images from Scanned Photographic Plates
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…
Compressed sensing of astronomical images:orthogonal wavelets domains
Vasil Kolev
A simple approach for orthogonal wavelets in compressed sensing (CS) applications is presented. We compare efficient algorithm for different orthogonal wavelet measurement matrices…
Multiplierless Modules for Forward and Backward Integer Wavelet Transform
Vasil Kolev
This article is about the architecture of a lossless wavelet filter bank with reprogrammable logic. It is based on second generation of wavelets with a reduced of number of operati…
Orthogonal multifilters image processing of astronomical images from scanned photographic plates
Vasil Kolev
In this paper orthogonal multifilters for astronomical image processing are presented. We obtained new orthogonal multifilters based on the orthogonal wavelet of Haar and Daubechie…