fourier domain
Target Classification with Low-Resolution Radars Based on Multifractal Features in Fractional Fourier Domain
... fractional Fourier domain, the energy of the aircraft echoes can be maximally aggregated, and the distribution of clutter is relatively dispersed, so we should find the optimal fractional Fourier ...
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Tissue surface as the reference arm in Fourier domain optical coherence tomography
... Abstract. We present a simple method applicable to common-path Fourier domain optical coherence tomography (OCT) in which the tissue surface is used as the reference arm. We propose using aluminium ...
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Fourier-Domain Electromagnetic Wave Theory for Layered Metamaterials of Finite Extent
... new Fourier-domain representation for the electromagnetic field solution in a generic layered medium under the constraints of loss and finite ...the Fourier-domain field solution into a compact ...
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High-accuracy sub-pixel motion estimation from noisy images in Fourier domain
... Abstract—In this paper, we propose a new method for estimating sub-pixel motion via exploiting the principle of phase correlation in the Fourier domain. The method is based on linear weighting of the ...
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Reliability of RTVue, Visante, and Slit Lamp Adapted Ultrasonic Pachymetry for Central Corneal Thickness Measurement
... of Fourier-domain optical coherence tomogra- phy (OCT) (RTVue), time-domain OCT (Visante), and slit-lamp adapted ultra- sonic pachymetry (SL-US) in the measurement of central corneal thickness ...
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Computational Microscopy: Breaking the Limit of Conventional Optics
... Previous demonstrations of FPM only applied this aperture synthesis process to low-NA microscope setups [31, 51, 53]. To extend FPM to the high-NA case, we start from a conventional microscope with a 20X 0.5NA objective ...
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Application of Fractional Fourier Transform to Moving Target Indication via Along-Track Interferometry
... fractional Fourier transform (FrFT), is applied to SAR along-track interferometry (SAR-ATI) in order to estimate moving target ...fractional Fourier axis, the FrFT permits a constant-velocity target to be ...
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Analysis of Annular Ring Microstrip Patch on Uniaxial Medium via Hankel Transform Domain Immittance Approach
... for annular ring patch [17, 18], analysis of a microstrip circular ring structure on uniaxial medium is performed by using equivalent circuits determined based on the Hankel-transform-domain formulations. In order ...
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Subpixel Registration Directly from the Phase Difference
... techniques, Fourier domain methods [21– 25] and also closely related spatial domain variations [26] are an important class of registration techniques that have gained popularity due to their ...
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Aspects of binary image reconstruction from Fourier amplitude data
... 3D Fourier transform of the ...the Fourier data at greater than the Nyquist ...image domain sup- port constraint. Since the Fourier domain samples are at the Nyquist rate, but only the ...
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Nonlinear ultrasound image modeling: Development of a complete end-to-end model for qualitative and quantitative analysis of medical ultrasound
... THE USER MAY WISH TO VIEW THE TIME DATA AND ITS FOURIER DOMAIN REPRESENTATION BY ;THESE ;SIGNAL, ITS FREQUENCY DOMAIN ;EACH THE FOLLOWING COMMAND STATEMENTS: ;UNCOMMENTING ;Start uncomme[r] ...
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ETC System Design for Image Using Random Permutation and Run Length Encoding
... Random key is genetated according to the size of the cluster. Finally permutation process is performed with key generation and encryption algorithm. Specifically, permutation-based image encryption approach conducted ...
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Skin Blood Flow Response Signal Using Time and Frequency Domain Features for Pressure Ulcer Evaluation
... FFT was applied to the segmented data to yie ld the estimated powe r spectrum. In this study, short, moderate and prolonged recovery time are selected as K =1800, K=6000, and K=24000 respectively. SBFR signal is ...
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Design and Performance Analysis of FFT in OFDM applications using VHDL
... time domain samples are passed to the channel simulation allows examination of common wireless channel characteristics such as noise, multipath, and ...Fast Fourier Transform (FFT) converts the time ...
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Solution of Boundary and Mixed Problems in an Arbitrary Domain Using Fourier Transforms
... In this work, we develop a method to solve partial differential equations in arbitrary domains by applying Fourier Transform technique. The main target of this work are the linear elastic problem. For such, the ...
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PROTOTYPING OF IMAGE ENHANCEMENT ALGORITHMS USING BEAGLE BOARD FOR RURAL HEALTH MONITORING
... spatial domain algorithm enhance the images directly by transforming the image and there is no preprocessing required for this purpose while the Frequency domain algorithms require some operations by using ...
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Microwave Frequency Characterisation of Squeezed Light From an Optical Parametric Oscillator
... Another interesting characterisation of high frequency squeezing would be the com- parison of simultaneous measurements of squeezing at different multiples of the FSR. This may not initially seem an interesting question ...
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Equivalent Source from 3D Inversion Modeling for Magnetic Data Transformation
... The results of transformation using the 3D equivalent- source and also the filtering technique in the frequency domain are presented in Figure 4. In general, the transformations using the 3D equivalent-source show ...
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Study and Analysis of Fourier Transformation
... The Fourier transform of a function is implemented the Wolfram Language as FourierTransform[f, x, k], and different choices of and can be used by passing the optional FourierParameters-> a, b ...
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Improved Computational Time for Circular / Linear Convolution using FFT by Matrix Multiplication
... time domain of two signal x and h is perform by multiplying its discrete fourier transform and the converting it in time domain by inverse discrete fourier ...
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