Lens Distortion Explorer by Michael Quinn

Michael Quinn (view profile)

• 2 files
• 18 downloads
• 5.0

Explore a standard lens distortion model. (camera calibration, lens distortion, image processing)

Elastic Distortion Transformation on an image by David Franco

David Franco (view profile)

• 1 file
• 7 downloads
• 0.0

Expanding Data Sets through Elastic Distortions (convolution, convolutional neural ..., dataset)

elasticfilter.m

barrel and pincushion lens distortion correction by Jaap de Vries

Jaap de Vries (view profile)

• 2 files
• 48 downloads
• 4.46154

I = LENSDISTORT(I, k)corrects for radially symmetric distortions (image processing, mathematics, optics)

lensdistort(I, k, varargin)

Stereoscopic Structural Distortion Metric (StSD) by Varuna De Silva

Varuna De Silva (view profile)

• 8 files
• 85 downloads
• 4.70667

Low complexity objective measurement of compression artifacts in stereoscopic 3D video (video quality, 3d, stereoscopic video)

StSD_lc(distorted_left, reference_left, distorted_right, ...

yuv_import(filename,dims,numfrm,startfrm,yuvformat)

Lidar Imaging Case Study(with Geometric Distortion Correction) by Robert Bemis

Robert Bemis (view profile)

• 24 files
• 447 downloads
• 4.06316

Case study used in Advanced Image Processing seminars (highlights algorithm development) (application, remove distortion bac..., segment objects)

model_lidar_and_validate_tform

Binary Image Watermarking/Data Hiding: Data, Algorithms, and Distortion Measure by Haiping Lu

Haiping Lu (view profile)

• 5 files
• 99 downloads
• 4.55556

A package on binary image watermarking/data hiding, including data, algorithms & distortion measure. (watermarking, data hiding, binary image)

CalDisTable(ImName,Dimention)

CalDistTable(ImName,Dimention)

CalDistTable(img,MaskSize)

Pinch and Spherize Filter by Dirk-Jan Kroon

Dirk-Jan Kroon (view profile)

• 72 files
• 3202 downloads
• 4.52444

Distortion filter, warps an image, spherize or pinch as in Photoshop (spherical, spherize, pinch)

PinchSpherize(I,Gamma,R0)

movepixels(I,Tx,Ty)

Nonlinear Drift Correction from Scanning Probe Microscopy (SPM) Orthogonal Image Pairs by Colin Ophus

Colin Ophus (view profile)

• 1 file
• 3 downloads
• 5.0

Correct nonlinear drift distortions in scanning probe images. (scanning probe micros..., nonlinear drift corre..., image processing)

SPmakeImage(sMerge,indImage,indLines)

SPmerge01(scanAngles,varargin)

SPmerge02(sMerge,refineMaxSteps)

Project 3D into 2D image coordinates using a camera model by Zachary Taylor

Zachary Taylor (view profile)

• 4 files
• 124 downloads
• 4.9

Project 3D points using a camera model with lens distortion parameters (point cloud, camera, projection)

projectPoints( points, K, T, D, imageSize, sortPoints )

Demo.m

Reversible Image Data hiding using Quad-tree Segmentation and Histogram Shifting by Krishna Kumar P

Krishna Kumar P (view profile)

• 7 files
• 109 downloads
• 3.83333

A high capacity histogram based reversible data hiding with relatively lower distortion. (quad tree, quad treesegmentation, reversible data hidin...)

Predicate(region,sq)

Split(b,mindim,fun)

convert_binary(abc)

Field Mapping Toolbox by Simon Robinson

Simon Robinson (view profile)

• 5 files
• 81 downloads
• 4.16667

Methods for B0 Mapping with Multi-Channel RF Coils in MRI (Robinson and Jovicich, MRM, 2011) (mri, field mapping, multichannel rf coils)

centre_and_save_nii(image_nii, filename, pixdim)

centre_header(nii_hdr)

centre_header_file(filename)

Bjontegaard metric by Giuseppe Valenzise

Giuseppe Valenzise (view profile)

• 1 file
• 11 downloads
• 4.0

Computes the Bjontegaard metric to measure the average difference between two rate-distortion curves (image processing, video coding, ratedistortion)

bjontegaard(R1,PSNR1,R2,PSNR2,mode)

test_bjontegaard.m

Video Synopsis by Costas Panagiotakis

Costas Panagiotakis (view profile)

• 13 files
• 86 downloads
• 4.0

Video Synopsis - Key frames Selection based on a Distortion Minimization method (key frames detection, video, video processing)

HierarchicalAlg1(ind, D_all, b, DistortionOf3Alg, Distort...

HierarchicalAlg2(ind, D_all, b, DistortionOf3Alg, Distort...

TimeEquidistant(ind, D_all, b, DistortionOf3Alg, Distorti...

Image normalization and inverse normalization by Sugar Tang

Sugar Tang (view profile)

• 2 files
• 31 downloads
• 4.77778

Performs image normalization and inverse normalization against affine transformation (geometric transformat..., image registration, image normalization)

iminvnorm(normim, height, width, normtform, udata, vdata)

imnorm(im)

test.m

von Mises image entropy by Salvador Gabarda

Salvador Gabarda (view profile)

• 4 files
• 22 downloads
• 4.0

Algorithm to determine the von Mises distribution of the image Rényi entropy. (image processing, image quality assessm..., rnyi entropy)

vonmisesentropy.m

circularmaskplus(ro,co,i0,j0,r)

localwigner(X,N,theta,units,period,window_shape)

feature-based retinal image registration by Li CHEN

Li CHEN (view profile)

• 2 files
• 29 downloads
• 4.02381

feature point, retinal image , image registration, blood vessel (image processing, image registration, feture extraction)

featurematch(featuremat1, featuremat2, NumMin, NeighborNum)

findangle(boundvec, startidx)

point_angle(bw, seed, R, start, NeighborNum)

ECC image alignment algorithm (image registration) by Georgios Evangelidis

Georgios Evangelidis (view profile)

• 1 file
• 33 downloads
• 5.0

This is a Matlab implementation of the ECC image alignment (image registration) algorithm. (image alignment, image registration, gradientbased registr...)

ecc(image, template, levels, noi, transform, delta_p_init)

image_jacobian(gx, gy, jac, nop)

next_level(warp_in, transform, high_flag)

Wavelet Decomposition For Images by Michael Chan

Michael Chan (view profile)

• 52 files
• 287 downloads
• 4.11292

The demo decouples the wavelet operations from the plotting. (wavelet, image processing, multiresolution)

PSNR(A,B)

displayResultantWaveletImages(A, H, V, D, levelOfDecompos...

observeWaveletDecompositionBenchmark_N_levels.m

A review of Image Warping by MU

MU (view profile)

• 1 file
• 2 downloads
• 1.0

Introduction of image warping application (image processing)

Prophetanity/Thermographic-Image-Processing-GUI by JayKretzmann

JayKretzmann (view profile)

• 1 file
• 9 downloads
• 5.0

A thermographic signal processing toolbox (GUI) (image processing, thermography, gui)

image mosaic using SIFT by Ke Yan

Ke Yan (view profile)

• 17 files
• 510 downloads
• 4.51373

Automatic image mosaic using SIFT, RANSAC and homography. (image processing, image mosaic, sift)

imMosaic.m

appendimages(image1, image2)

findHomography(pts1,pts2)

Image Manipulation Toolbox by DGM

DGM (view profile)

• 9 files
• 76 downloads
• 5.0

A collection of image manipulation tools of varying utility (image processing, image conversion, image manipulation)

addborder(inpict,width,color)

akZoom(handles, mButtons_ZoomPanReset)

batchloader(path,imgnums,basename)

Importance of Image Phase Information Demo by Michael Chan

Michael Chan (view profile)

• 52 files
• 287 downloads
• 4.11292

The objective is to illustrate the importance of image phase as the cardinal information source. (image processing, amplitude, phase)

FFT_image( imageInGray )

IFFT_image(imageInGray_fft_amplitudeOnly, imageInGray_fft...

PSNR(A,B)

Simple Warping Routine by Alex /Gloria Ossadtchi /Halfacre

Alex /Gloria Ossadtchi /Halfacre (view profile)

• 1 file
• 4 downloads
• 4.6

Rerforms simple 2-D warping based on a set of reference points (geometric transformat..., image registration, warping)

warpitfun(pink,get,Zp,Zg)

warpingfunsup.m

PSNR Calculator by Karthik MSwamy

Karthik MSwamy (view profile)

• 1 file
• 7 downloads
• 3.0

Calculates the peak signal-to-noise ratio (PSNR) between two given frames. (psnr, image, video)

PSNRCal(X,Xhat)

main.m

Joint source-channel coding of images by Nikola Sprljan

Nikola Sprljan (view profile)

• 7 files
• 90 downloads
• 4.4

Transmission of SPIHT encoded images over unreliable channels (image processing, communications)

BSC_BER(InputStream,parametar)

GE_awgn(InputStream,parametar)

Punct_Variables(Memory,Ib,Kb,PN,P,PunctInd,packet_siz,CRC...

3D Image Reorientation and De-rotation by Mike Newton

Mike Newton (view profile)

• 2 files
• 15 downloads
• 0.0

Facilitates assisted or automatic reorientation and automatic de-rotation of 3D image stacks (3d, image processing, image reorientation)

imstack_reorient.m

imstack_derotate(masks_re,TF,R,R_re)

HSY <-> RGB Image Conversion Tools by DGM

DGM (view profile)

• 9 files
• 76 downloads
• 5.0

Convert images between RGB and HSY, a polar variant of YPbPr with normalized and bounded chroma. (color, image conversion, image processing)

hsy2rgb(inpict,mode)

imcast(inpict,outclass)

rgb2hsy(inpict,mode)

Aerial image calculation and Photolithography simulation matlab by ahmed saleh

ahmed saleh (view profile)

• 27 files
• 206 downloads
• 1.0

Aerial image calculation and Photo-lithography simulation matlab (aerial image, light passing through..., matlab)

Description.m

Camera Calibration for Video Surveillance Toolbox by Shengzhe Li

Shengzhe Li (view profile)

• 1 file
• 9 downloads
• 0.0

A matlab toolbox for easy camera calibration in video surveillance. (camera calibration, video surveillance, computer vision)

barcode reader by Indraneel Biswas

Indraneel Biswas (view profile)

• 4 files
• 92 downloads
• 3.16667

barcode reader which does not use thresholding (barcode, image processing, signal processing)

barcodeEAN13(C)

diffScheme(g)

movAvg(g,wt)

Hiding image in sound (im2sound) by Stephen

Stephen (view profile)

• 1 file
• 13 downloads
• 5.0

Converts an image into a sound file. Played through a spectrum analyser, the image is revealed. (image, sound, hiding)

im2sound(filename, ext, f_sample, f_low, f_high, amp_...

HuSL <-> RGB Image Conversion Tools by DGM

DGM (view profile)

• 9 files
• 76 downloads
• 5.0

Convert images between RGB and 'Human-Friendly HSL' (HuSL), a chroma-normalized variant of LAB/LUV (color, image conversion, image processing)

husl2rgb(inpict,varargin)

imcast(inpict,outclass)

lch2rgb(inpict,varargin)

Objective evaluation of binarization methods for document images by Reza Farrahi Moghaddam

Reza Farrahi Moghaddam (view profile)

• 9 files
• 53 downloads
• 4.83333

Several measures are implemented to evaluate the output of the binarization methods. (objective evaluation, document image proces..., binarization)

my_compute_precision_recall_fmeasure(u, u0_GT, u0_SKL_GT)

objective_evaluation(listfilename, outputfile, varargin)

objective_evaluation_core(u, u0_GT, u_SKL_GT)

Wavelet Based Sharp Features (WASH): An Image Quality Assessment Metric Based on HVS by Aneesh

Aneesh (view profile)

• 1 file
• 5 downloads
• 0.0

This is an implementation of the WASH algorithm to calculate the perceptive image quality. (wash, wavelet based iqa met...)

WASH_IQA_METRIC(ref_image,dist_image,K1,K2,C)

Quadtree coding with adaptive scanning order for space-borne image compression by Ke-Kun Huang

Ke-Kun Huang (view profile)

• 7 files
• 35 downloads
• 5.0

Matlab code for QCAO published in Signal Processing: Image Communication, 2017 (image processing)

decode.m

get_blkorder.m

SSIM(X,Y)

Tools for NIfTI and ANALYZE image by Jimmy Shen

Jimmy Shen (view profile)

• 5 files
• 919 downloads
• 4.46719

Load, save, make, reslice, view (and edit) both NIfTI and ANALYZE data on any platform (medical, reslice, isotropic)

affine(old_img, old_M, new_elem_size, verbose, bg, method)

bipolar(M, lo, hi, contrast)

bresenham_line3d(P1, P2, precision)

Kinect Infrared (IR) and Depth Image Simulator by Michael Landau

Michael Landau (view profile)

• 1 file
• 22 downloads
• 4.57143

Simulation tool that generates noisy Kinect IR and depth images from a user inputted CAD model (microsoft kinect, disparity estimation, depth image)

KinectSimulator_Depth.m

KinectSimulator_IR.m

Preprocess_RefImgs(varargin_ref)

Remote sensing image compression based on binary tree and optimized truncation by Ke-Kun Huang

Ke-Kun Huang (view profile)

• 7 files
• 35 downloads
• 5.0

Matlab code for BTOT published in Digital Signal Processing, 2017 (image processing)

decode.m

TravDep_dec(blktree_dec,j,blkcode,ci,Tk)

TravDep_enc(blktree,j,Tk,tlev,blkimg_rec)

Video Watermarking using DWT by Sudaraka Mallawaarachchi

Sudaraka Mallawaarachchi (view profile)

• 6 files
• 89 downloads
• 5.0

Encode secret image in a video (video processing, watermarking, dwt)

convRGBYUV(RGB)

convYUVRGB(YUV)

dwt_embedd(frame,secret,x)

Imsnapshot by Martin Teley

Martin Teley (view profile)

• 1 file
• 2 downloads
• 5.0

Connect points in your scatterplot with images of the measurement. (scatterplot, image, snapshot)

imsnapshot(img,location,point,width,varargin)

Binary tree coding with adaptive scanning order by Ke-Kun Huang

Ke-Kun Huang (view profile)

• 7 files
• 35 downloads
• 5.0

The matlab source code for binary tree coding with adaptive coding(BTCA) algorithm. (image processing)

get_scanorder.m

func_Dec(codeList,i,Tk)

func_Dec_lev(codeList,Tk)

2D Gabor Wavelets by Zhi Chai

Zhi Chai (view profile)

• 1 file
• 29 downloads
• 3.90909

Create and show 2D Gabor Wavelets (filtering, gabor, wavelets)

GaborWavelet

GaborExample.m

basic_lbp(A) by Muhammed Cinsdikici

Muhammed Cinsdikici (view profile)

• 2 files
• 16 downloads
• 4.0

Basic simple Local Binary Pattern filter function (local binary pattern, nlfilter)

basic_lbp(A)

Arrow plotter by Ryan Molecke

Ryan Molecke (view profile)

• 1 file
• 17 downloads
• 4.0

very simple customizable inline function to draw arrows. (arrow, plotting, image processing)

draw_arrow(startpoint,endpoint,headsize)

Ncorr by Justin Blaber

Justin Blaber (view profile)

• 2 files
• 62 downloads
• 4.91667

2D-DIC program that uses contiguous circular subsets, biquintic B-spline interp, and complex ROIs (digital image correla..., dic, mechanical)

Manual Ground Plane Mark up and Camera Calibration by Ben

Ben (view profile)

• 1 file
• 3 downloads
• 5.0

Can be used to crudely calibrate camera by eye and define groundplane. (computer vision, camera calibration, ground plane estimati...)

CameraCalib(varargin)

readISQ by Johan Karlsson

Johan Karlsson (view profile)

• 1 file
• 3 downloads
• 5.0

A reader for .ISQ CT files from Scanco scanners. (image processing, data import, matlab)

readISQ(filename,slicerange,window,progress)

Fully Automatic Signal Spectrum Analyser by aasim Azooz

aasim Azooz (view profile)

• 11 files
• 53 downloads
• 4.13

The program produces the frequency spectrum of any signal (image processing, signal processing, fft)

Spectrum_Analyser(t,v,f1,f2,delta)

maxima(tt,u1)

FingerPrint Matching: A simple approach by Vahid K. Alilou

Vahid K. Alilou (view profile)

• 3 files
• 219 downloads
• 4.82292

A simple fingerprint matching method (fingerprint, matching, fvc2002)

build_fmr.m

angular_filter_bank(BW,fname)

build_db(ICount, JCount)