📄 demo2.mht
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Subject: demo2
Date: Mon, 13 Nov 2006 15:57:01 +0800
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<DIV style=3D"TEXT-ALIGN: center"><BIG><BIG>Demo step by step:<BIG> =
</BIG><STRONG=20
style=3D"FONT-WEIGHT: normal">Image Segmentation with Normalized Cuts=20
</STRONG></BIG></BIG><BR><BIG><BIG><STRONG=20
style=3D"FONT-WEIGHT: normal"></STRONG></BIG></BIG></DIV>
<DIV style=3D"TEXT-ALIGN: center"><BIG><BIG><STRONG=20
style=3D"FONT-WEIGHT: normal"><SMALL><SMALL>(file=20
demoNcutImage.m)</SMALL></SMALL></STRONG></BIG></BIG><BR><BIG><BIG><STRON=
G=20
style=3D"FONT-WEIGHT: =
normal"></STRONG></BIG></BIG></DIV><BIG><BIG><BR></BIG></BIG><CODE><SPAN =
style=3D"FONT-FAMILY: courier new,courier,monospace"><NOBR>%% read =
image, change=20
color image to brightness image, resize to 160x160<BR>I =3D=20
imread_ncut('specific_NcutImage_files/jpg_images/3.jpg',160,160);<BR><BR>=
%%=20
display the image<BR>figure(1);clf; imagesc(I);colormap(gray);axis=20
off;<BR>disp('This is the input image to segment, press Enter to=20
continue...');<BR>pause;<BR></NOBR><BR><BIG style=3D"FONT-WEIGHT: =
bold"><BIG>This=20
is the input image to segment, press Enter to=20
continue...</BIG></BIG><BR><BR></SPAN><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><IMG=20
style=3D"WIDTH: 300px; HEIGHT: 225px" alt=3Dimage=20
src=3D"file:///E:/MATLAB6p5/mydir/NormalizedCuts/demo2.files/1.jpg"><BR><=
BR></SPAN><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><NOBR>%% compute =
the edges=20
imageEdges, the similarity matrix W based on<BR>%% Intervening Contours, =
the=20
Ncut eigenvectors and discrete segmentation<BR>nbSegments =3D=20
5;<BR>disp('computing Ncut eigenvectors ...');<BR>tic;<BR><SPAN=20
style=3D"COLOR: =
rgb(255,0,0)">[SegLabel,NcutDiscrete,NcutEigenvectors,NcutEigenvalues,W,i=
mageEdges]=3D=20
NcutImage(I,nbSegments);</SPAN><BR>disp(['The computation took ' =
num2str(toc) '=20
seconds on the ' num2str(size(I,1)) 'x' num2str(size(I,2)) '=20
image']);<BR></NOBR><BR style=3D"FONT-WEIGHT: bold"><BIG=20
style=3D"FONT-WEIGHT: bold"><BIG><NOBR>computing Ncut eigenvectors =
...<BR>The=20
computation took 14.5 seconds on the 160x160=20
image<BR></NOBR></BIG></BIG><BR><BR><NOBR>%% display the =
edges<BR>figure(2);clf;=20
imagesc(imageEdges); axis off<BR>disp('This is the edges computed, press =
Enter=20
to continue...');<BR>pause;<BR><BR><BIG><BIG><SPAN=20
style=3D"FONT-WEIGHT: bold">This is the edges computed, press Enter to=20
continue...</SPAN></BIG></BIG><BR><BR></NOBR></SPAN><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><IMG=20
style=3D"WIDTH: 300px; HEIGHT: 225px" alt=3Dsegmentation=20
src=3D"file:///E:/MATLAB6p5/mydir/NormalizedCuts/demo2.files/2.jpg"><BR><=
/SPAN><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><NOBR>%% display =
the=20
segmentation<BR>figure(3);clf<BR>bw =3D=20
edge(SegLabel,0.01);<BR>J1=3Dshowmask(I,imdilate(bw,ones(2,2))); =
imagesc(J1);axis=20
off<BR>disp('This is the segmentation, press Enter to=20
continue...');<BR>pause;<BR><BR></NOBR><BIG><BIG><SPAN=20
style=3D"FONT-WEIGHT: bold">This is the segmentation, press Enter to=20
continue...</SPAN></BIG></BIG><BR><BR><IMG style=3D"WIDTH: 300px; =
HEIGHT: 225px"=20
alt=3Dsegmentation=20
src=3D"file:///E:/MATLAB6p5/mydir/NormalizedCuts/demo2.files/3.jpg"><BR><=
/SPAN></SPAN><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><SPAN=20
style=3D"FONT-FAMILY: courier new,courier,monospace"><NOBR>%% display =
Ncut=20
eigenvectors<BR>figure(4);clf;set(gcf,'Position',[100,500,200*(nbSegments=
+1),200]);<BR>[nr,nc,nb]=20
=3D size(I);<BR>for i=3D1:nbSegments<BR> =20
subplot(1,nbSegments,i);<BR> =20
imagesc(reshape(NcutEigenvectors(:,i) , nr,nc));axis('image');axis=20
off;<BR>end<BR>disp('This is the Ncut eigenvectors...');<BR>disp('The =
demo is=20
finished.');<BR><BR><BIG><BIG><SPAN style=3D"FONT-WEIGHT: bold">This is =
the=20
clustering result</SPAN><BR style=3D"FONT-WEIGHT: bold"><SPAN=20
style=3D"FONT-WEIGHT: bold">The demo is finished.</SPAN><BR=20
style=3D"FONT-WEIGHT: bold"></BIG></BIG><BR></NOBR><IMG=20
style=3D"WIDTH: 750px; HEIGHT: 125px" alt=3D"ncut eigenvectors"=20
src=3D"file:///E:/MATLAB6p5/mydir/NormalizedCuts/demo2.files/4.jpg"><BR><=
/SPAN></SPAN><BR></CODE><BR></BODY></HTML>
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