matlab作业.docx
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- 上传时间:2023-05-17
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matlab作业.docx
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matlab作业
a=imread('d:
\abc.jpg');
a1=imcrop(a,[80,120,100,50]);
subplot(1,2,1),imshow(a);
subplot(1,2,2),imshow(a1);
-----------------------------------------------
c=imread('d:
\abc.jpg');
c1=imresize(c,0.5);
c2=imresize(c,[100,100]);
subplot(1,2,1),imshow(c1);
subplot(1,2,2),imshow(c2);
-------------------------------------------------
b=imread('d:
\abc.jpg');
b1=imadjust(b,[0.2,0.5],[0,1]);
imshow(b1);
-----------------------------------
b=imread('d:
\abc.jpg');
b1=rgb2gray(b);
imshow(b1,16);
-------------------------------------
RGB=imread('d:
\abc.jpg');
G=RGB(:
:
2);
BW=dither(G);
figure,imagesc(G),colormap(gray)
figure,image(BW),colormap(gray
(2))
---------------------------------------------
I=imread('d:
\123.jpg');
J=histeq(I);
figure,imshow(I),figure,imshow(J)
-------------------------------------------------
loadtrees
BW=im2bw(X,map,0.4);
figure,imshow(X,map),figure,imshow(BW)
------------------------------------------
BW1=imread('circbw.tif');
BW2=bwperim(BW1,8);
figure,imshow(BW1)
figure,imshow(BW2)
---------------------------------------------
I=imread('d:
\123.jpg');
BW1=edge(I,'prewitt');
BW2=edge(I,'canny');
figure,imshow(BW1)
figure,imshow(BW2)
-------------------------------------------------
1.Makea3-Dbinaryimagecontainingtwooverlappingspheres.
center1=-10;
center2=-center1;
dist=sqrt(3*(2*center1)^2);
radius=dist/2*1.4;
lims=[floor(center1-1.2*radius)ceil(center2+1.2*radius)];
[x,y,z]=meshgrid(lims
(1):
lims
(2));
bw1=sqrt((x-center1).^2+(y-center1).^2+...
(z-center1).^2)<=radius;
bw2=sqrt((x-center2).^2+(y-center2).^2+...
(z-center2).^2)<=radius;
bw=bw1|bw2;
figure,isosurface(x,y,z,bw,0.5),axisequal,title('BW')
xlabelx,ylabely,zlabelz
xlim(lims),ylim(lims),zlim(lims)
view(3),camlight,lightinggouraud
-----------------------------------------------------
watershed10202f2.jpg
2.Computethedistancetransformofthecomplementofthebinary
image.
D=bwdist(~bw);
figure,imshow(D,[],'InitialMagnification','fit')
title('Distancetransformof~bw')
----------------------------------------------
watershed10203f3.jpg
Computethewatershedtransform,anddisplaytheresultinglabel
matrixasanRGBimage.
L=watershed(D);
rgb=label2rgb(L,'jet',[.5.5.5]);
figure,imshow(rgb,'InitialMagnification','fit')
title('WatershedtransformofD')
-----------------------------------------------------
watershed10205f1.jpg
D=bwdist(~bw);
figure,isosurface(x,y,z,D,radius/2),axisequal
title('Isosurfaceofdistancetransform')
xlabelx,ylabely,zlabelz
xlim(lims),ylim(lims),zlim(lims)
view(3),camlight,lightinggouraud
--------------------------------------------------
watershed10206f1.jpg
D=-D;
D(~bw)=-Inf;
L=watershed(D);
figure,isosurface(x,y,z,L==2,0.5),axisequal
title('Segmentedobject')
xlabelx,ylabely,zlabelz
xlim(lims),ylim(lims),zlim(lims)
view(3),camlight,lightinggouraud
figure,isosurface(x,y,z,L==3,0.5),axisequal
title('Segmentedobject')
xlabelx,ylabely,zlabelz
xlim(lims),ylim(lims),zlim(lims)
view(3),camlight,lightinggouraud
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