Code covered by the BSD License  

Highlights from
ind2patch

5.0

5.0 | 1 rating Rate this file 10 Downloads (last 30 days) File Size: 2.47 KB File ID: #28210
image thumbnail

ind2patch

by

 

Allows plotting of patch data (slices and voxels) for 3D images for selected voxels

| Watch this File

File Information
Description

This function generates patch data (faces “F”, vertices “V” and color data “C”) for 3D images. The patches are only generated for the voxels specified by the linear indices in “IND”. The variable “ptype” indicates
the type of patch:

‘v’ Voxel (box)
‘sx’, ‘sy’, ‘sz’ Mid-voxel slice for x, y and z direction respectively
%% EXAMPLE
clear all; close all; clc;

%% Simulating 3D image
[X,Y,Z]=meshgrid(linspace(-4.77,4.77,75));
phi=(1+sqrt(5))/2;
M=2 - (cos(X + phi*Y) + cos(X - phi*Y) + cos(Y + phi*Z) + cos(Y - phi*Z) + cos(Z - phi*X) + cos(Z + phi*X));
M=M./max(M(:)); %Normalise, not required

figure;fig=gcf; clf(fig); colordef (fig, 'white'); units=get(fig,'units'); set(fig,'units','normalized','outerposition',[0 0 1 1]); set(fig,'units',units); set(fig,'Color',[1 1 1]);
hold on; xlabel('X-J','FontSize',20);ylabel('Y-I','FontSize',20);zlabel('Z-K','FontSize',20);

%% Creating and plotting patch data

%Setting up indices for slices to plot
S=round(size(M,2)./2);
L_slices=false(size(M));
L_slices(:,S,:)=1;
IND_slices=find(L_slices);
[Fs,Vs,C_slice]=ind2patch(IND_slices,M,'sx'); %Creating patch data for x mid-voxel slices
hs=patch('Faces',Fs,'Vertices',Vs,'EdgeColor','none', 'CData',C_slice,'FaceColor','flat','FaceAlpha',0.75);

%Setting up indices for slices to plot
S=round(size(M,1)./2);
L_slices=false(size(M));
L_slices(S,:,:)=1;
IND_slices=find(L_slices);
[Fs,Vs,C_slice]=ind2patch(IND_slices,M,'sy'); %Creating patch data for y mid-voxel slices
hs=patch('Faces',Fs,'Vertices',Vs,'EdgeColor','none', 'CData',C_slice,'FaceColor','flat','FaceAlpha',0.75);

%Setting up indices for slices to plot
S=round(size(M,3)./2);
L_slices=false(size(M));
L_slices(:,:,S)=1;
IND_slices=find(L_slices);
[Fs,Vs,C_slice]=ind2patch(IND_slices,M,'sz'); %Creating patch data for z mid-voxel slices
hs=patch('Faces',Fs,'Vertices',Vs,'EdgeColor','none', 'CData',C_slice,'FaceColor','flat','FaceAlpha',0.75);

%Setting up indices for voxels to plot
IND=find(M>-0.2 & M<=0);
[Fs,Vs,C_slice]=ind2patch(IND,M,'v'); %Creating patch data for selection of low voxels
hs=patch('Faces',Fs,'Vertices',Vs,'EdgeColor','k', 'CData',C_slice,'FaceColor','flat','FaceAlpha',1);

%Setting up indices for voxels to plot
IND=find(M>0.9);
[Fs,Vs,C_slice]=ind2patch(IND,M,'v'); %Creating patch data for selection of high voxels
hs=patch('Faces',Fs,'Vertices',Vs,'EdgeColor','k', 'CData',C_slice,'FaceColor','flat','FaceAlpha',1);

axis equal; view(3); axis tight; colormap jet; colorbar; caxis([0 1]); grid on;
set(gca,'FontSize',20);

MATLAB release MATLAB 7.4 (R2007a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (1)
31 Jul 2010 Yomismo

Awesome.

I´ll use this for wave propagation models. Very easy to use code.

Thank you.

Contact us