47 citations · 150 across the 31 of their papers we have counts for
14 papers · 1 filter
Quantum spectral analysis: frequency in time, with applications to signal and image processing
Mario Mastriani
A quantum time-dependent spectrum analysis, or simply, quantum spectral analysis (QSA) is presented in this work, and it is based on Schrodinger equation, which is a partial differ…
Enhanced Directional Smoothing Algorithm for Edge-Preserving Smoothing of Synthetic-Aperture Radar Images
Mario Mastriani, Alberto E. Giraldez
Synthetic aperture radar (SAR) images are subject to prominent speckle noise, which is generally considered a purely multiplicative noise process. In theory, this multiplicative no…
Neural shrinkage for wavelet-based SAR despeckling
Mario Mastriani, Alberto E. Giraldez
The wavelet shrinkage denoising approach is able to maintain local regularity of a signal while suppressing noise. However, the conventional wavelet shrinkage based methods are not…
Fuzzy thresholding in wavelet domain for speckle reduction in Synthetic Aperture Radar images
Mario Mastriani
The application of wavelet transforms to Synthetic Aperture Radar (SAR) imagery has improved despeckling performance. To deduce the problem of filtering the multiplicative noise to…
Denoising based on wavelets and deblurring via self-organizing map for Synthetic Aperture Radar images
Mario Mastriani
This work deals with unsupervised image deblurring. We present a new deblurring procedure on images provided by low-resolution synthetic aperture radar (SAR) or simply by multimedi…
Kalman's shrinkage for wavelet-based despeckling of SAR images
Mario Mastriani, Alberto E. Giraldez
In this paper, a new probability density function (pdf) is proposed to model the statistics of wavelet coefficients, and a simple Kalman's filter is derived from the new pdf using…
New wavelet-based superresolution algorithm for speckle reduction in SAR images
Mario Mastriani
This paper describes a novel projection algorithm, the Projection Onto Span Algorithm (POSA) for wavelet-based superresolution and removing speckle (in wavelet domain) of unknown v…
Denoising and compression in wavelet domain via projection onto approximation coefficients
Mario Mastriani
We describe a new filtering approach in the wavelet domain for image denoising and compression, based on the projections of details subbands coefficients (resultants of the splitti…
New version of Gram-Schmidt Process with inverse for Signal and Image Processing
Mario Mastriani
The Gram-Schmidt Process (GSP) is used to convert a non-orthogonal basis (a set of linearly independent vectors, matrices, etc) into an orthonormal basis (a set of orthogonal, unit…
Fast Cosine Transform to increase speed-up and efficiency of Karhunen-Loeve Transform for lossy image compression
Mario Mastriani, Juliana Gambini
In this work, we present a comparison between two techniques of image compression. In the first case, the image is divided in blocks which are collected according to zig-zag scan.…
Systholic Boolean Orthonormalizer Network in Wavelet Domain for SAR Image Despeckling
Mario Mastriani
We describe a novel method for removing speckle (in wavelet domain) of unknown variance from SAR images. The me-thod is based on the following procedure: We apply 1) Bidimentional…
3D zigzag for multislicing, multiband and video processing
Mario Mastriani
We present a 3D zigzag rafter (first in literature) which allows us to obtain the exact sequence of spectral components after application of Discrete Cosine Transform 3D (DCT-2D) o…
Quantum Edge Detection for Image Segmentation in Optical Environments
Mario Mastriani
A quantum edge detector for image segmentation in optical environments is presented in this work. A Boolean version of the same detector is presented too. The quantum version of th…
Rule of Three for Superresolution of Still Images with Applications to Compression and Denoising
Mario Mastriani
We describe a new method for superresolution of still images (in the wavelet domain) based on the reconstruction of missing details subbands pixels at a given ith level via Rule of…