Multidimensional Systems and Signal Processing
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Local receptive fields based extreme learning machine with hybrid filter kernels for image classification
Multidimensional Systems and Signal Processing - - 2019
A generalization of the octonion Fourier transform to 3-D octonion-valued signals: properties and possible applications to 3-D LTI partial differential systems
Multidimensional Systems and Signal Processing - Tập 31 - Trang 1227-1257 - 2020
The paper is devoted to the development of the octonion Fourier transform (OFT) theory initiated in 2011 in articles by Hahn and Snopek. It is also a continuation and generalization of earlier work by Błaszczyk and Snopek, where they proved few essential properties of the OFT of real-valued functions, e.g. symmetry properties. The results of this article focus on proving that the OFT is well-defin......
Fractal capacity dimension of three-dimensional histogram from color images
Multidimensional Systems and Signal Processing - Tập 21 - Trang 197-211 - 2009
To contribute to the important task of characterizing the complex multidimensional structure of natural images, a fractal characterization is proposed for the colorimetric organization of natural color images. This is realized from their three-dimensional RGB color histogram, by applying a box-counting procedure to assess the dimensionality of its support. Regular scaling emerges, almost linear ov......
Monitoring of potato crops based on multispectral image feature extraction with vegetation indices
Multidimensional Systems and Signal Processing - Tập 33 - Trang 683-709 - 2022
The number of individuals working in agriculture is decreasing due to a labor shortage. When switching from manual to automation mode, image mapping must survey soil testing and plant vegetation development. The existing studies met several shortcomings in terms of higher cost remote sensing tools, higher execution time, higher computational complexity, and so on. To tackle these issues, we propos......
Concurrent speakers localization using blind source separation and microphone array geometry
Multidimensional Systems and Signal Processing - Tập 32 - Trang 1159-1184 - 2021
Speaker localization has been an active topic of research due to its wide range of applications in multimedia and communication technologies. While traditional blind source separation algorithms are robust in reverberant environments, they are generally unable to localize more than two concurrent speakers. In this paper, a novel method for localization of concurrent speakers using blind source sep......
Efficient FPGA architecture of optimized Haar wavelet transform for image and video processing applications
Multidimensional Systems and Signal Processing - Tập 32 - Trang 821-844 - 2021
Discrete Wavelet Transform (DWT) is widely used in digital image and video processing due to its various advantages over other similar transform techniques. In this paper, efficient hardware architecture of Optimized Haar Wavelet Transform is proposed which is modeled using Optimized Kogge–Stone Adder/Subtractor, Optimized Controller, Buffer, Shifter and D_FF blocks. The existing Kogge–Stone Adder......
A formulation in concordance with the sampling theorem for band-limited images reconstruction from projections
Multidimensional Systems and Signal Processing - Tập 7 - Trang 27-52 - 1996
A rigorous method for band-limited images reconstruction from sampled projections is presented. The problem is formulated as the minimization of a quadratic criterion expressed in the frequency domain; consequences of spectral support limitation and sampling are taken into account. Then, the optimal reconstruction is obtained in two steps: a classical 1D-convolution/backprojection followed by the ......
Range-angle pencil-beamforming for non-uniformly distributed array radar
Multidimensional Systems and Signal Processing - Tập 29 - Trang 867-886 - 2017
Digital beamforming with non-uniformly distributed array radar can make full use of resources and enhance the target detection capability. However, it encounters severe grating lobes and high false alarm probability. In this paper, a novel range-angle pencil-beamforming with the non-uniformly distributed frequency diverse array (FDA) is proposed. FDA is referred to as an array transmitting linearl......
Extending depth of field and dynamic range from differently focused and exposed images
Multidimensional Systems and Signal Processing - Tập 27 - Trang 493-509 - 2015
Focus stacking and high dynamic range (HDR) imaging are two paradigms of computational photography. Focus stacking aims to produce an image with greater depth of field (DOF) from a set of images taken with different focus distances; HDR imaging aims to produce an image with higher dynamic range from a set of images taken with different exposure values. In this paper, we present an algorithm which ......
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