2,758 results

Robust and fast 2D weighted phase unwrapping based on Ghiglia and Romero (1994)

unwrap the phase. This scripts implements the algorithm from Ghiglia and Romero (1994) that uses least-square methods to solve the problem. The algorithm runs relatively quickly and the algorithm is also

Phase unwrapping with implementing TV (Total Variation) minimization algorithm.

This is the function to unwrap 2*pi jumps on extracted phase from interferogram. This function implemented TV (Total Variation) minimization algorithm (ANTONIN CHAMBOLLE, “An Algorithm for Total

Robust Phase Unwrapping for MR Temperature Imaging

The 'example.m' script shows how to use the algorithm. The file 'sunwrap.m' contains the actual algorithm.The code is available here:GitHub: https://github.com/fmaier/MRM-2014-Phase

Quantitative Magnetic Resonance Imaging Made Easy with qMRLab: Use GUI or CLI to fit and simulate a myriad of qMRI models.

Numerical computation with functions

Fast 2D phase unwrapping implementation in MATLAB

. Kasim, "Fast 2D phase unwrapping implementation in MATLAB", https://github.com/mfkasim91/unwrap_phase/ (2017).This algorithm is also available from GitHub (https://github.com/mfkasim91/unwrap_phase/)

an approach to deal with high noise and to unwrap successfully phase data

Taking into account influence of noise in wrapped data, a calibration method of the 1st order spatial phase derivative is proposed and an iterative approach is presented.

2D phase unwrapping algorithm based on the Transport of Intensity Equation(TIE) and unwrapped phase correction.

we develop a simple and robust phase-unwrapping algorithm based on the transport of intensity equation (TIE). In our method, the TIE was solved using the fast cosine transform, and a phase correction

Several direct and iterative phase unwrapping algorithms based on solving the Poisson equation are presented.

Several direct and iterative phase unwrapping algorithms based on solving the Poisson equation are presented. The differences between them are the way to calculate the input and output of the

2D & 3D phase unwrapping plugins for Matlab

compile:mex phaseUnwrap.cppInput must be a real, double matrix from Matlab.

Release 10.0301 of a collection of functions for analysis/display of seismic and well-log data.

Implementation of Costantini's 2D unwrapping method based on network programming

Track optical distortions in a checkerboard pattern with high accuracy in real-time using the FCD method

track displacements as small as 0.01 pixels and up to about 4 pixels (For larger displacements phase unwrapping may be required. A basic implementation for this is included.)- Can resolve high virtual

LaserPulse is a Matlab class for simulations in nonlinear and ultrafast optics.

Implementations of the phase quality path following method and Goldstein's branch cut method.

Two 2D phase unwrapping approaches are included:1. Phase quality guided path following method.2. Goldstein's branch cut method.The algorithms are described in:D. C. Ghiglia and M. D. Pritt

Methods for B0 Mapping with Multi-Channel RF Coils in MRI (Robinson and Jovicich, MRM, 2011)

The main features of this B0 field mapping (FM) toolbox are describedin Robinson and Jovicich (MRM, 2011). In brief, they arei) combination of phase information from multi-channel coils using

2D weighted Laplace unwrapping with preconditioned conjugate gradient algorithm

This phase unwrapping algorithm is based on the theory and c++ code from: "Two-Dimensional Phase Unwrapping, Theory, Algorithms, and Software" written by Dennis C. Ghiglia and Mark D. Pritt This

Implements the paper "Phase unwrapping by accumulation of residual maps," OLEN, 2015.

Description: this code implements the paper:[1] Mariano Rivera, Francisco Hernandez-Lopez and Adonai Gonzalez, "Phase unwrapping by accumulation of residual maps," to appear in Optics and Lasers in

Updated Goldstein's branch cut method of 2D phase unwrapping

This is an update of Bruce Spottiswoode's 2D phase unwrapping algorithms. This version runs much faster. This was partly done by cleaning up the decision logic.Also, it matches +/- residues by having

A simulator for evaluating Gaussian optics and simulate projection onto a photodiode.

A simulator for evaluating Gaussian optics and simulate projection onto a photodiode. Visual representation of intensity/phase fields as described by Gaussian optics.A simulator for evaluating

Updates the phase quality-guided path following phase unwrapping method by Bruce Spottiswoode

logic more parallel to the updated GoldsteinUnwrap2D_r1 code. Corrected one line in PhaseDerivativeVariance_r1.m. the phase quality path following phase unwrapping method by Bruce Spottiswoode.

Unwrapping the phase of bandpass filter measurements produces unreliable results. This submission addresses the problem.

The stock MATLAB unwrap.m function works great for data that has a lowpass frequency response. Bandpass data is a different story. The stopbands of the bandpass data is at each extreme of the

PUROR presents a fast phase unwrapping algorithm.

Liu J. and Drangova M., "Intervention-based multidimensional phase unwrapping using recursive orthogonal referring", Magnetic Resonance in Medicine, Volume 68(4):1303-1316, 2012

MATLAB Code and Example Data for Fast and Accurate Phase Unwrapping of Complex Phase Maps

This MATLAB package provides FAPUX implementation for fast, accurate, and robust phase unwrapping solution, designed to handle challenging phase maps with discontinuities, and intricate spatial

Reconstruction of off-axis hologram

This MATLAB code reconstructs an off-axis hologram with phase unwrapping of the reconstructed phase distribution. For details see: T. Latychevskaia, P. Formanek, C.T. Koch, A. Lubk, "Off-axis and

IEV represents an algorithm for local frequency mapping from multi-ch and multi-echo data

Plot the phase portrait for the entered system of differential equations

: https://drive.google.com/drive/folders/1152DOOwuD15LD_EzwgH3XpRv08BDNzFc?usp=sharingChapter 2 provides a quick overview of the theoretical background. Chapter 3 contains the user guide and description of features.Chapter 4 provides some real life examples and phase portraits generated

You can use the Phase Plane and Slope Field apps to qualitatively analyze ordinary differential equations (ODEs).

Slope Field and Phase Plane apps have been written entirely from scratch in MATLAB App Designer using modern MATLAB coding practices. This makes the new apps easier to maintain, edit, and use.Getting

Performs 2D phase unwrapping, even if image is not squared. The angles should be in radians

Performs 2D phase unwrapping, even if image is not squared. The angles should be in radians between -pi and pi rangehttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2575666/

The MATLAB programs in "MATLAB/Simulink for Digital Communication" authored by Won Y. Yang et. al

Sideband)-AM(Amplitude Modulation)3.2 ANGLE MODULATION - FREQUENCY/PHASE MODULATIONSCHAPTER 4: ANALOG-TO-DIGITAL CONVERSION4.1 QUANTIZATION 4.1.1 Uniform Quantization 4.1.2 Non-uniform Quantization

Unwraps angles so that continuity is restored.

inputs change continuously, the angle will exhibit 2*pi jumps across the limits, which is sometimes undesirable (e.g. when the angle drives a control system).This block unwraps an input angle to the whole

Highly comparative time-series analysis

Medical software for Processing multi-Parametric images Pipelines

A tool for visualizing phasor (voltage, current, impedance), along with animation.

This program is a GUI that let's you specify two of three phasors (voltage, current, impedance). The other phasor is calculated. The phasors are displayed, inluding and animation of the voltage and

Superfast Quantitative Susceptibility Mapping from MRI phase data.

Variational Bayesian Analysis (VBA)

To process fringe patterns obtained from optical interferometry, fringe projection, SAR, MRI etc.

wft2f.m is for windowed Fourier transform. Please use "help wft2f" for details.unwrapping_qg_trim.m is for quality guided phase unwrapping. Please use "help unwrapping_qg_trim" for details.

Brainstorm: Open source application for MEG/EEG data analysis

Phase Spectrum Compensation (PSC) framework for speech enhancement.

Basic implementation of the Phase Spectrum Compensation (PSC) [1] method for single channel speech enhancement is included, along with a demo that illustrates its usage. References:[1] A.P. Stark

This MATLAB exercise implements a phase vocoder.

This MATLAB exercise implements a phase vocoder with the capability of speed-up or slow-down of a speech or audio signal by a factor, r, which varies from r = 0:25 (slow-down by factor of 4) to r =

phase plane plotting for a second order nonlinear system

Phase plane portrait is a very important tool to study the behavior and stability of a non-linear system.PhasePlane(sys,tspan,icond) plots the the phase plane portrait for a general second order

MATLAB phasors

Useful for electric phasors. Functions:Descripe phasors in polar as: R = [Length Angle]a = [30 40]b = [10 30]c = [40 -59]Pkon: Complex conjugatepkon(c) == [40 59]Pmult: Polar

Phase difference measurement between two signals via DFT or cross-correlation.

The present code is a Matlab function that provides a measurement of the phase difference (as an angle) or time difference (as time duration) between two signals. In the first case, the measurement

Magnitude and phase of a transfer function (i.e. linear system) at a specific point in the frequency domain.

mag_phase Magnitude and phase of a transfer function (i.e. linear system) at a specific point in the frequency domain.Syntax[mag,phase] = mag_phase(sys,x)[mag,phase] =

Six phase induction motor starts without one phase

This simulation simulates transient and steady state period in case of starting a six phase asymmetrical induction motor with malfunction in phase A (Phase A current is zero). The interesting thing

With a small update.

Plots the phase portrait of the Lorenz system.

Plots the phase portrait of the Lorenz system. Results are shown at each time interval, thus creating an animation. Solution can be viewed at several angles (az and el need to be changed). Feel free

Simplifies use of tall arrays with fileDatastore

This function could plot the phase portrait of the 2-dimentional autonomous system, and is configurable for arrows, vector fileds, etc.

, we only need one single command to get the phase portrait.plotpp(@(t,x)[x(2);-x(1)-1*x(2)])In the second example, we plot the phase portrait of the van der Pol equation:We set the time span to 20

Communicate with I2C or SPI devices using Total Phase Aardvark I2C/SPI board.

Instrument Control Toolbox™ Support Package for Total Phase Aardvark I2C/SPI™ Interface enables you to use the Total Phase Aardvark adaptor to communicate, using I2C or SPI interfaces, with your

Near-Field to Far-Field Transformation for Antenna Measurements

. Werner, "Satellite Radar Interferometry: Two-Dimensional Phase Unwrapping", Radio Sci., Vol. 23, No. 4, pp. 713-720, 1988.9. D. C. Ghiglia and M. D. Pritt, "Two-Dimensional Phase Unwrapping: Theory

This script estimates the gas-phase velocity from Phase Doppler Anemometry data. The package includes a sample to let you run the code.

This set of matlab scripts can be used to process Phase-Doppler Anemometry data to estimate the gas-phase velocity without using any rule of thumb. If you use the code, please cite:Erika Rácz, Milan

Phase-based estimation of the optical flow field.

The code implements the optical flow algorithm described in Gautama, T. and Van Hulle, M.M. (2002). A Phase-based Approach to the Estimation of the Optical Flow Field Using Spatial Filtering,IEEE

Routines for creating color representations of complex functions (phase plots)

The ZIP-file provides several routines for creating color representations of complex (in particular analytic and meromorphic) functions. Basically the argument (phase) of the function is encoded by a

This example implements a Three-Phase Modular Multi-Level Converter (MMC).

This example shows the operation of a Three-Phase Modular Multi-Level Converter (MMC) using only Simscape™ Electrical™ Specialized Power Systems (SPS) components.It shows how to control in open-loop

Stator Voltage Control of 3-phase IM is implemented by use of 3-Phase Ac voltage controller

The Circuit simulated above is one of the topologies of 3-Phase AC Voltage Controllers whose output is fed to IM for drive applications* A Pdf file is attached to best explain the operation of the

The Simulink model of A high-performance single-phase SFT-based PLL that gives outstanding performance is given

A high performance single-phase phase-locked loop using a sliding Fourier transform is proposed in this paper. The new PLL is using the sliding Fourier transform as a phase detector. The orthogonal

Closed loop control of three phase grid connected sine pwm inverter in synchronous reference frame

Three phase grid connected inverter is driven using Sine PWM. The sine references are generated using a PLL and Harmonic oscillator. The closed loop control is implemented in synchronous reference

Jitter from phase noise vs. frequency data Calculates RMS jitter from phase noise power.

Usage:Jitter = Pn2Jitter(f, Lf, fc)Inputs:f: Frequency vector (phase noise break points), in Hz, row or column.Lf: Phase noise vector, in dBc/Hz, same dimensions, size(), as f.fc: Carrier frequency

phase shift keying