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updated 6 days ago

Generate Random Numbers from a 2D Discrete Distribution by Tristan Ursell

Random numbers from any 2D discrete probability distribution, at any resolution. (discrete, distribution, generate)

[x0,y0]=pinky(Xin,Yin,dist_in,varargin)

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updated 2 months ago

PeakFinder by Nathanael Yoder

Quickly finds local maxima (peaks) or minima (valleys) in a noisy signal. (signal processing, maxima, minima)

peakfinder(x0, sel, thresh, extrema, include_endpoints)

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updated 4 months ago

Oscillator and Signal Generator by W. Owen Brimijoin

A simple command-line function for generating standard waveforms, click trains and noise bursts. (signal generator, signal processing, oscillator)

oscillator(varargin)

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updated 4 months ago

POCShift.m by Jérémie Guignard

Estimates the translation between two noisy images with phase-only correlation. (image processing, image registration, noise)

POCShift.m

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updated 4 months ago

Automated EEG Repair Tool by Kristjan-Julius

Automatically detects and repairs EEG data that is noisy or contains artifacts (eeg, interpolation, automatic)

coreEXE( cfg, data )

defineBadNeigh( cfg, eeg_data )

detectionAlgorithm( prestim, freq, eeg_data )

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updated 6 months ago

Gillespie Stochastic Simulation Algorithm by Nezar

Simulate discrete stochastic models of chemical reaction networks. (simulation, modeling, chemistry)

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updated 9 months ago

Auto-Correlation and Noise by Shujaat Khan

Auto-Correlation and Noise Properties with increasing realization size (noise, filtersnoise cancella...)

Auto_Cor(x);

[y]=my_conv(x,b);

ergo_check( x )

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updated 9 months ago

EMPCA by Vicente Parot

Expectation-Maximization Principal Component Analysis (pca, expectation maximizat..., gpu)

empca(a, ncomps, emtol, maxiters)

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updated 9 months ago

Noise-Power Spectrum by Erik Fredenberg

Generate random noise with a specified noise-power spectrum (NPS) and measure the NPS of an image. (physics, medical, image processing)

...

calc_digital_nps(I, n, px, use_window, average_stack)

cart2rad(nps_x, f_x, n, unq)

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updated 10 months ago

Impact Isolation Class by Edward Zechmann

This program caculates the Impact Isolation Class (IIC) given the input LN values in dB. (acoustics, noise, sound)

[A2, A_str, real_digitsL, real_digitsR, imag_digitsL, ima...

[A2, A_str, real_digitsL, real_digitsR, imag_digitsL, ima...

[A_str]=SI_prefix_num(A)

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updated 11 months ago

Continuous Sound and Vibration Analysis by Edward Zechmann

This program analyzes sound and vibrations data using metrics for continuous noise and vibrations. (dsp, sound, vibrations)

ACdsgn(Fs)

ArgStruct=parseArgs(args,ArgStruct,varargin)

D=Data

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updated 12 months ago

Air Absorption by Edward Zechmann

Calculates sound absorption (attenuation) in humid air (sound, air, noise)

air_absorption.m

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updated 1 year ago

snr by Marco Borges

snr function calculates signal-to-noise ratio in decibel or amplitude (snr, signaltonoise ratio, noise)

snr(signal, noise, typ, noisy)

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updated 1 year ago

Tests against the null hyptothesis of whiteness by Hanan Shteingart

Tests whether a given signal is white (delta function in autocorrelation) (whiteness, random, noise)

white_test(x, maxlag, alpha)

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updated 1 year ago

Adaptive noise cancellation using LMS algorithm. by jerin

Its like single perceptron neural network.. (adaptive, signal processing, noise)

noisecancel.m

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updated 1 year ago

Pink, Red, Blue and Violet Noise Generation with Matlab Implementation by Hristo Zhivomirov

Pink, red, blue and violet noise generation via spectral processing of white noise. (noise, measurement, signal processing)

bluenoise(N)

pinknoise(N)

rednoise(N)

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updated 1 year ago

Calculation of CT MTF and NPS using the ACR accreditation phantom by Saul

This code enables measurements of CT MTF and NPS from images of an ACR accreditation phantom. (computed tomography, ct, modulation transfer f...)

SliceBrowser(varargin)

mtfcalc.m

npscalc.m

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updated 1 year ago

Generate points from given conic (A,B,C,D,E,F) by Juan

generate points from ellipse, hyperbola, circles, etc. (mathematics, conics, ellipse)

points_from_conic(A,B,C,D,E,F, domain,number_points, nois...

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updated 1 year ago

Step and impulse responses under the effect of noise or uncertainty by Lazaros Moysis

This file demonstrates how the responses of a system change, for small fluctuations of ω and j. (response, step, impulse)

robust1c.m

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updated 1 year ago

Nadaraya-Watson smoothing by Jan Motl

A non-parametrical regression (smoothing) tool using Gaussian kernel. (regression, smoothing, smooth)

[smoothed score h]=smoothing(ydata,varargin)

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updated almost 2 years ago

Image Noise Reduction by Local Statistics by Tristan Ursell

Reduce image noise by measuring local pixel statistics and remapping intensities. (image processing, image, noise)

[varargout]=relnoise(Iin,sz,sigma,varargin)

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updated 2 years ago

Dynamic non-local means (DNLM) for denoising of dynamic medical image sequences by Yaniv

Effective and robust denoising for 4D medical images (e.g. DCE-MRI, fMRI, dynamic PET) (noise, denoising, medical images)

dnlm.m

estimate_noise_dwt(img, Wname)

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updated 2 years ago

Formation of signal corrupted with noise by Eduard Polityko

Function forms a signal corrupted with noise and signal-to-noise ratio has a specified value (signal processing, snr, noise)

[s,varargout]=snrs(signal,noise,snr,varargin)

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updated 2 years ago

LMMSE filter for Rician MRI data by SANTIAGO AJA-FERNANDEZ

A filtering scheme for denoising MR data assuming an underlying Rician model. (mri, noise, denoising)

I_est=MRI_lmmse(Im,Ws,varargin)

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updated 2 years ago

Parallel MRI noisy phantom simulator by SANTIAGO AJA-FERNANDEZ

Simulator of noisy parallel acquisition MR data (GRAPPA and SENSE included) (magnetic resonance, noise, parallel imaging)

Wx=coef_x(coef,tasa,N,mode,full)

[Im]=k2x(ik,method)

[Im]=sos(iX)

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updated 2 years ago

FFTWN: Round up to efficient FFT integer by Andrew Davis

Accepts an integer n. Returns m>=n that is an optimum data length for fast FFT computation (noise, fourier analysis, signal processing)

fftwn(n)

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updated 2 years ago

Noise estimators for MRI data Toolbox by SANTIAGO AJA-FERNANDEZ

Several methods to automatically estimate the level of noise in single- and multiple-coil MRI (noise estimation, mri, image processing)

CV=cvlocal(I,Ws,inses)

M=localMAD(I,Wn)

Vl=localvar3D_mask(I,mask,Ws,inses)

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updated 2 years ago

wavdither by Drew Weymouth

Exports audio data to a .wav file with dithering. (wavwrite, dither, quantization)

wavdither(y,Fs,nbits,wavefile,noiseType)

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updated 2 years ago

PSNR for 2d images by Suraj Kamya

Simplest model to calculate the PSNR value between two 2d images of same dimension. (image processing, psnr, snr)

PSNR

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updated 2 years ago

Image filtering by CNTM

Improved adaptive complex diffusion despeckling filter (NCDF) (signal processing, image processing, medical)

twodncdf(imgIn, TMAX)

demo.m

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updated 2 years ago

Create a Simulated Image of Diffraction Limited Spots with Noise by Tristan Ursell

Create images with diffraction-limited spots of varying size and intensity, with noise. (image, create, creation)

[Iout,Inoise,spot_data]=spotmaker(im_sz,num_spots,varargin)

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updated 2 years ago

Random Numbers from a Discrete Distribution by Tristan Ursell

Simple algorithm to generate random numbers from a user-defined discrete probability distribution. (random, number, variable)

gendist(P,N,M,varargin)

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updated 2 years ago

Nth_Oct_Hand_Arm_&_AC_Filter_Tool_Box by Edward Zechmann

Features Nth octave band, Hand Arm, and A and C weighting filters (noise, nth octave, octave)

ACdsgn(Fs)

Test_Nth_oct_filters1(resample_filter)

[A2, A_str, real_digitsL, real_digitsR, imag_digitsL, ima...

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updated 3 years ago

Coaxial Cable Based Digital Communication System Simulator by Iftekhar Tanveer

It is a GUI based MATLAB code to simulate a digital communication system. (signal processing, communications, digital signal)

BERCalc(Br,inpt_vol,coding, ...

DigitalTransmissionGUI(varargin)

Sim_EyePat(Br,inpt_vol,coding, ...

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updated 3 years ago

Add Noise by Kamil Wojcicki

Add noise to a signal at a prescribed SNR level. (snr, signal to noise ratio, db)

addnoise( signal, noise, snr )

myspectrogram(s, fs, T, w, nfft, Slim, alpha, cmap, cbar,...

test_addnoise_sinusoid.m

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updated 3 years ago

fftnoise - generate noise with a specified power spectrum by Aslak Grinsted

Useful helper function for Monte Carlo null-hypothesis tests and confidence interval estimation. (surrogate, noise, random)

noise=fftnoise(f,Nseries)

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updated 3 years ago

filtre de kalman time varying Design by Chemsou Anis

to perform time-varying Kalman filtering, it is easy to implement the filter recursions in MATLAB. (noise, kalman, filter)

filtre_de_kalman_time_varying_Design.m

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updated almost 4 years ago

Feedback active noise control system using FbLMS algorithm by Agustinus Oey

Use of feedback active control system for reducing narrow band noise. (acoustics, noise, least mean square)

try_fblms.m

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updated almost 4 years ago

Image noise generation by Michael Chan

Illustrates different noise type generation of different severity on images (noise, generation, gaussian)

...

imagePlot( imageData, plotRowSize, plotColSize, ...

imageQualityIndex (img1, img2, block_size)

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updated almost 4 years ago

Active noise control system using FxLMS algorithm by Agustinus Oey

Implementation of FxLMS algorithm for a single channel feed-forward active noise control system. (acoustics, noise, least mean square)

try_fxlms.m

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updated 4 years ago

Fast Non-Local Means 1D, 2D Color and 3D by Dirk-Jan Kroon

NL-means image and signal denoising filter based on similarity between pixel patches (nonlocal, means, nlmeans)

J=NLMF(I,Options)

NLMF2Dtree(I, Options)

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updated 4 years ago

AKUZOFT ACOUSTIC SOFTWARE by Marco Araos

zip file with: Akuzoft archives Manual Akuzoft (acoustic modeling, acoustic panels, computer application)

Akuzoft(varargin)

CES.m

CEXT.m

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updated 4 years ago

Sound Transmission Class STC by Edward Zechmann

Program calculates Sound Transmission Class (STC) from transmission loss data. (signal processing, acoustics, transmission loss)

STC.m

[A2, A_str, real_digitsL, real_digitsR, imag_digitsL, ima...

[A_str]=SI_prefix_num(A)

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updated 4 years ago

DSB modulation & demodulation for voice signal by Alireza LIAGHAT

simulation of double side band (DSB) modulation & demodulation (modulation, demodulation, dsb)

dsbvoiceSignal

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updated 4 years ago

Robust interpolation by Don MacLeod

1D linear interpolation despite failures of monotonicity in x or y (interpolation, noise, quantization)

robustinterp(Xdata, Ydata, targetX)

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updated 4 years ago

Lee filter by Grzegorz Mianowski

Lee filter for reducing speckle noise in images (image filtering, adaptive filtering, local statistics)

OIm=myLee(I)

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updated 4 years ago

Simple acoustic horn design for amplification by Edward Zechmann

Simple acoustic horn designs for exponential and catenoidal horns. (horn, acoustic, noise)

DXF_end(fid)

DXF_line(fid,x,y,x1,y1,linecolour,linetype)

DXF_lint(fid,linetype)

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updated 4 years ago

Add Uniform Noise by Ibraheem Al-Dhamari

Add uniform noise ranged from 0 to 255 to a graysscaled image. (add, noise, uniform)

NA=addnoise(A,sz)

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updated 4 years ago

Weighted Non-stationary Averaging by Ikaro Silva

Dynamically performs weighted averaging and SNR estimation under a non-stationary noise. (snr, nonstationary, noise)

[atrials,average]=wnsfmp(tmp,init,param,mode)

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updated 4 years ago

Baseband numeric transmission by Alain Demange

Baseband data transmission via m-ary NRZ raw code (communications, modulations, eyediagram)

BaseBandNumTransmission_en.m

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