2D FDTD code with TF/SF interface and UPML absorbing borders by Vasily Kozhevnikov

Simple example implements FDTD + UPML + Total Field/Scattered Field interface (fdtd, 2d, te)

FDTD_2D

akZoom by Alexander Kessel

Allows direct zooming and panning with the mouse in 2D plots. Works with plotyy and multiple axes. (2d, axes, mouse)

akZoom.m

Plasticine simulation by Maxim Vedenyov

Plasticine circle by its own mass compressed on table. 2d (plasticine, simulation, 2d)

test1.m

test2.m

test3.m

2d and 3d brain plots by Jeremy Manning

Quickly and easily create 2d and 3d plots of fMRI data. (fmri, pcolor, 2d)

PATCH_3Darray(varargin)

getTightSubplotHandles(FIG_MARGIN,ROW_MARGIN,COLUMN_MARGIN,...

plot_brain2d(x,meta,nrow,ncol,dim,c,s)

Valentines Day Greetings by Ajit ranjan

Just a Mathematical relationship ... (graphics, heart curve, valentines)

Valentines_beating_heart.m

Diffeomorphic Log Demons Image Registration by Herve Lombaert

Simple matlab code for 2D and 3D image registration using the diffeomorphic log-demons algorithm (image processing, image registration, 2d)

compose(ax,ay,az, bx,by,bz)

demons

demons

Superformula generator 2d by Giuseppe Cardillo

generator of superformula plot (2d, plot, gielis)

Gielis2d(varargin)

Hexagonal Scatter Plot by Salman Mashayekh

It reduces the resolution of a high resolution data and outputs a 2D hexagonal scatter plot. (hexagon, hexagonal plot, scatter)

hexScatter(xData,yData,cData,xLim,yLim,rHex,ifFillEmptyHex)

hexScatterDemo.m

Image Noise Reduction by Local Statistics by Tristan Ursell

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

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

N Dimensional Cardinal Spline (Catmull-Rom) Spline Interpolation by Dr. Murtaza Khan

N -Dimensional cubic Cardinal spline (Catmull-Rom) Interpolation (3d, interpolation, 2d)

[MatNbyNPlusOne]=crdatnplusoneval(P0,P1,P2,P3,T,n)

[Pu] =evalcrdnd(P0,P1,P2,P3,T,u)

main.m

Gabor Filetr GUI by Nikolay S.

Design apply and learn the Gabor Filter via GUI. (gui, image enhancement, filter bank)

Gabor Filter GUI

GaborFilterDesighnNik(varargin)

Four-Bar Polode Animation by Don Riley

Animates all classes of 4-bar mechanisms, plots instant center paths, allows link length changes. (kinematics, animation, 4bar)

Four-Bar Polode Animation

Animate_Four_Bar_Polodes

calc_meshdata by Immanuel Anjam

Calculates the affine transformations for integration in 2D/3D via the unit triangle/tetrahedron. (integration, 2d, unit reference triang...)

[x,y]=geom(bs,s)

calc_meshdata(dim,p,ef,t)

inttet(p)

Flatten Any Mulitdimensional Matrix into a 2-D Matrix! by Darin Koblick

Convert any multidimensional matrix into a 2-D Matrix. Then convert it back to its original form. (matrix, 2d, flattening)

eDim(fND,fSeq)

fDim(ND,dim)

multiDimDemo()

Savitzky-Golay smoothing filter for 2D data by Shao Ying Huang

This function provide a Savitzky-Golay smoothing filter for 2D data. (savitzkygolay, 2d data, 2d)

savitzkyGolay2D_rle_coupling(x,z,mIN,lengthX,lengthZ,order)

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)

2D Distance Transform of Arbitrary Points by Tristan Ursell

Distance transform from arbitrary points at a user set resolution and range. (image, point, points)

[Xvec,Yvec,Dist]=clouddist(Xin,Yin,xlim,ylim,res)

Connect Randomly Ordered 2D Points into a Minimal Nearest-Neighbor Closed Contour by Tristan Ursell

Connects randomly ordered 2D points into a minimal nearest neighbor contour. (points, distance, neighbor)

[Xout,Yout,varargout]=points2contour(Xin,Yin,P,direction,va...

Segments Intersection Test Functions by Francesco Montorsi

Functions that count the intersections among 2-D segments. Special cases are accounted for. (segment, 2d, intersection)

test_segments_intersect

Matrix Convolution with Sub-Pixel Resolution by Tristan Ursell

Convolve two matrices at sub-pixel resolution, using bilinear interpolation. (matrix, convolve, convolution)

matout=matoverlay(mat1,mat2,x,y)

Active Shape Model (ASM) and Active Appearance Model (AAM) by Dirk-Jan Kroon

Cootes 2D/3D Active Shape & Appearance Model for automatic image object segmentation and recognition (2d, active appearance mod..., active shape model)

A=imresize3d(V,scale,tsize,ntype,npad)

AAM_2D_example.m

AAM_3D_train_example.m

Shape Context Based Corresponding Point Models by Dirk-Jan Kroon

Shape Context based nonrigid registration of 2D/3D objects, to build Active Shape Models (icp, contour, 3d)

A=imresize3d(V,scale,tsize,ntype,npad)

A=imresize3d(V,scale,tsize,ntype,npad)

A=imresize3d(V,scale,tsize,ntype,npad)

Points On Line by Ankur Pawar

Linearly spaced points between two point and ,point in Convex Hull test. (points on line, line, 2d)

[inHullPoints,inPointsIndex]=inConvHull(vert,face,testPoint...

points=pointsOnLine(point1,point2,numPoints)

sphericalDodecahedron

solar system formation 2d by Maxim Vedenyov

2d balls with friction and gravitations (solar system, formation, 2d)

F=calulate_forcies(r,n,G,idm,al,v)

[id id2 nn]=invers_distancies(r,n)

[r v n]=delete_far_points(r,v,rmx,n)

Kinect Microsoft SDK by Dirk-Jan Kroon

Video, Audio, Depth Stream and Skeleton tracking (microsoft sdk, 2d, 3d)

compile_cpp_files(MicrosoftSDKPath)

Example.m

ExampleMicrophone.m

Snake : Active Contour by Dirk-Jan Kroon

Snake Segmentation (Kass et al), 2D/3D including GVF and balloon force (Easy to read code) (1987, witkin, contour)

B=SnakeInternalForceMatrix2D(nPoints,alpha,beta,gamma)

B=SnakeInternalForceMatrix3D(FV,alpha,beta,gamma)

ExternalForceImage2D(I,Wline, Wedge, Wterm,Sigma)

2D Line Curvature and Normals by Dirk-Jan Kroon

Accurate Curvature and Normals of a line/contour consisting of 2D points (curvature, curves, vertices)

N=LineNormals2D(Vertices,Lines)

k=LineCurvature2D(Vertices,Lines)

Sub-pixel locations in 2D image by yang

The sub-pixel locations are solved by forming a Taylor series (subpixel, 2d, image)

subpix2d(R, C, L)

2D histogram - 'exact' and 'fast' binning, 'crop' and 'stretch' grid adjustment by tudor dima

2D histogram of data pairs [x,y]; 'fast'/'exact' binning; 'stretch'/'crop' grid mode. (statistics, probability, histogram)

hist2(vxy, mesh_minmaxN_xy, varargin)

Shortest distance between two line segments by Nick Gravish

Function computes the shortest distance between two line segments. (2d, geometry, intersection)

DistBetween2Segment(p1, p2, p3, p4)

Laplacian in 1D, 2D, or 3D by Andrew Knyazev

Sparse (1-3)D Laplacian on a rectangular grid with exact eigenpairs. (2d, 3d, laplacian)

laplacian(varargin)

2D polynomial fitting with SVD by Richard Whitehead

Fits a polynomial f(x,y) to best fit the data points z using SVD. (2d, polynomial, fitting evaluation92)

eval2dPoly( x, y, coeffs )

fit2dPolySVD( x, y, z, order )

Bayes classification for 2D Gaussian distributions by Edward Wiggin

Draw Bayes classification results for 2D Gauss. distributions, return func. handles of N post. prob. (bayes, gaussian distribution, 2d)

drawBayesGauss2D(mu,c,prProb,ax)

Phased Array Design Toolbox v2.4 by Neill Tucker

A toolbox allowing rapid definition and evaluation of 2D and 3D phased array antennas. (2d, phased array, simulation)

Kinect Matlab by Dirk-Jan Kroon

Microsoft Kinect, OpenNI wrapper, Skeleton, Depth (2d, kinect, wrapper)

J=imagemax(Iin)

[I_SSD,I_NCC]=template_matching(T,I)

compile_cpp_files(OpenNiPath)

histograms for ND data by Diederick

Create histograms for ND data using ND bins (histogram, nd data, 2d)

histnd(varargin)

2-D convolution using the FFT by David Young

Convolution in 2-D using the Fast Fourier Transform. (convolution, filtering, fft)

conv_fft2(x, m, shape)

exindex(arr, varargin)

Fast 2-D convolution by David Young

Speeds up many 2-D convolutions using the SVD; also finds a fast approximation in other cases. (2d, filtering, convolution)

convolve2(x, m, shape, tol)

exindex(arr, varargin)

Shortest Distance Between Two Lines in N dimensions by Alexander Brodsky

Function calculates shortest distance between two lines presented by two points for each line. (2d, plot, intersection)

[dist Pc Qc]=distBW2lines(L1,L2)

B-spline Grid, Image and Point based Registration by Dirk-Jan Kroon

B-spline registration of two 2D / 3D images or corrsp. points, affine and with smooth b-spline grid. (3d, bspline, registration)

A=imresize3d(V,scale,tsize,ntype,npad)

Dlocal=jacobiandet_transform_2d_double(Ox,Oy,Isize,dx,dy)

E=strain(Ux,Uy,Uz)

Fast/Robust Template Matching by Dirk-Jan Kroon

Template Matching with SSD Block Matching and Normalized CC, (color) 2D and 3D (template matching, block matching, sum of squared differ...)

[I_SSD,I_NCC,Idata]=template_matching(T,I,IdataIn)

Minimum Entropy Deconvolution (MED 1D and 2D) by Geoff McDonald

Generates a 1D FIR filter iteratively to minimize the entropy of the filtered signal(s). (1d, deconvolution, minimum entropy decon...)

med2d(x,filterSize,termIter,termDelta,plotMode)

Skeleton 2D by Roberto Herrera

A basic example of skeletons in 2D, using maltab. (skeleton, 2d, topology)

skeleton.m

2d liquid simulation by Maxim Vedenyov

in rectangle without air. (liquid, simulation, 2d)

[V,C,N]=prepare_cells(a,b,r)

liquid_2d_rectangle.m

liquid_2d_rectangle_gif.m

Viewer3D by Dirk-Jan Kroon

MIP, Color, Slice and Shaded 3D (shearwarp) Volume Rendering, interactive 3D view/measurement GUI (3d, dicom, mip)

B=SnakeInternalForceMatrix2D(nPoints,alpha,beta,gamma)

B=SnakeInternalForceMatrix3D(FV,alpha,beta,gamma)

ErrorData3D(varargin)

Plot to Bitmap by Dirk-Jan Kroon

Plot lines (and text) directly into a bitmap, including filled polygons. (bitmap, image, text)

I=bitmapplot(x,y,Ibackground,options)

I=bitmaptext(lines,I,pos,options)

Length of cross of segment and rectangle by Maxim Vedenyov

If segment is outside rectangle then return 0 (segment, cross, rectangle)

L=segment_rectange(a,b,r)

rcr=cross_perimeter(a,b,r)

zz_segment_rectange_test.m

GPUCONV2 by Dirk-Jan Kroon

Example, Matlab R2010B Cuda CONV2 on GPU using Cuda kernels (cuda, conv2, gpu)

gpuconv2(A,B,SHAPE)

nvcc(varargin)

N-Dimensional Histogram Count by Mathew

Bins the elements of n matrices into an n-dimensional histogram. (histogram, hist, histc)

n=histcnd(varargin)

2D Vector Field Visualization by Nicholas Howe

Two functions that create visualizations of 2D vector fields (vector fields, 2d, quiver plot)

cquiver(varargin)

vfcolor(varargin)