imshow(flower)
colormap(copper)
n=size(X,1);
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','輪廓圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 100 50 20],...
    'callback',[...
        'cla,',...
        '[X,map]=imread(''flowers.tif'');,',...
        'X=double(flower);,',...
        'X=(0.25/256)*X;,',...
        'C=copper(35);,',...
        'set(gca,''colororder'',C(21:35,:),''box'',''on'');,',...
        'imcontour(X,3);,',...
        'axis([1 n 1 n]),',...
        'axis(''ij''),',...
        'axis(''square'')']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','偽彩圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[100 100 50 20],...
    'callback',[...
        'cla,',...
        'D=-del2(X);,',...
        'pcolor(D),',...
        'axis([1 n 1 n]),',...
        'axis(''ij''),',...
        'shading(''flat'')']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'string','3D表面圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 100 50 20],...
    'callback',[...
        'cla,',...
        'D=-del2(X);,',...
        'surf(X,D),',...
        'colormap(copper),',...
        'axis([1 n 1 n 0 1]),',...
        'axis(''ij''),',...
        'shading(''flat''),',...
        'view(-20,75);']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[80 50 80 30],...
    'callback','close'); 

實例79：圖像邏輯操作

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','實例79');
h1=axes('parent',h0,...
    'position',[0.25 0.45 0.5 0.5],...
    'visible','off');
load imdemos bacteria
imshow(bacteria)
k1=~(bacteria>100);
k2=filter2(fspecial('laplacian'),bacteria);
k3=(k2>-4)&k1;
k4=erode(k1)&(k3==0);
[r,c]=find(k4);
k5=bwselect(k1,c,r);
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','二值分割圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 110 50 20],...
    'callback',[...
        'cla,',...
        'imshow(k1)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','濾波結果圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[100 110 50 20],...
    'callback',[...
        'cla,',...
        'imshow(k2)']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'string','閾值化圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 110 50 20],...
    'callback',[...
        'cla,',...
        'imshow(k3)']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'string','目標的核',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 60 50 20],...
    'callback',[...
        'cla,',...
        'imshow(k4)']);
b5=uicontrol('parent',h0,...
    'units','points',...
    'tag','b5',...
    'style','pushbutton',...
    'string','目標分割圖',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[100 60 50 20],...
    'callback',[...
        'cla,',...
        'imshow(k5)']);
b6=uicontrol('parent',h0,...
    'units','points',...
    'tag','b6',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 60 50 20],...
    'callback','close');

實例80：進度條的使用

h0=figure('toolbar','none',...
    'position',[198 56 350 450],...
    'name','實例80');
h1=axes('parent',h0,...
    'position',[0.25 0.45 0.6 0.5],...
    'visible','off');

I=imread('flowers.tif');
imshow(I)
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','轉換',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[50 80 60 25],...
    'callback',[...
        'handlek=waitbar(0,''initializing......'');,',...
        'pause(0.5),',...
        'i=1;,',...
        'while  i<=100,',...
        'waitbar(i/100,handlek,[num2str(i),''%finished''],handlek),',...
        'i=i+1;,',...
        'pause(0.05),',...
        'end,',...
        'pause(1.5),',...
        'cla,',...
        'delete(handlek),',...
        'Y=rgb2ntsc(I);,',...
        'J=Y(:,:,1);,',...
        'imshow(J)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[150 80 60 25],...
    'callback','close');

例81：MRI數據的顯示

load mri
D = squeeze(D);
h0=figure('toolbar','none',...
    'position',[198 56 450 468],...
    'name','實例81');
h1=axes('parent',h0,...
    'position',[0.3 0.45 0.5 0.5],...
    'visible','off');
image_num = 8;
image(D(:,:,image_num))
axis image
colormap(map)
x = xlim;
y = ylim;
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[50 100 60 20],...
    'string','二維圖',...
    'callback',[...
        'cla,',...
        'contourslice(D,[],[],image_num),',...
        'axis ij,',...
        'xlim(x),',...
        'ylim(y),',...
        'daspect([1,1,1]),',...
        'colormap(''default'')']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[250 100 60 20],...
    'string','三維圖',...
    'callback',[...
        'cla,',...
        'phandles = contourslice(D,[],[],[1,12,19,27],8);,',...
        'view(3);,',...
        'axis tight,',...
        'set(phandles,''LineWidth'',2)']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[50 50 60 20],...
    'string','立體圖',...
    'callback',[...
        'cla,',...
        'Ds = smooth3(D);,',...
        'hiso = patch(isosurface(Ds,5),''FaceColor'',[1,.75,.65],''EdgeColor'',''none'');,',...
        'hcap = patch(isocaps(D,5),''FaceColor'',''interp'',''EdgeColor'',''none'');,',...
        'colormap(map),',...
        'view(45,30),',...
        'axis tight,',...
        'daspect([1,1,.4]),',...
        'lightangle(45,30),',...
        'lighting phong,',...
        'isonormals(Ds,hiso),',...
        'set(hcap,''AmbientStrength'',.6),',...
        'set(hiso,''SpecularColorReflectance'',0,''SpecularExponent'',50)']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[250 50 60 20],...
    'string','關閉',...
    'callback','close'); 

實例82：圖像類型轉換

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','實例82');
h1=axes('parent',h0,...
    'position',[0.2 0.45 0.5 0.5],...
    'visible','off');
load earth
clims = [10 60];
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','強度圖像',...
    'position',[30 120 50 20],...
    'callback',[...
        'cla,',...
        'imagesc(X,clims),',...
        'colormap(gray)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','索引圖像',...
    'position',[100 120 50 20],...
    'callback',[...
        'cla,',...
        'image(X),',...
        'colormap(map),',...
        'axis image']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'string','真彩圖像',...
    'position',[170 120 50 20],...
    'callback',[...
        'cla,',...
        'image(X),',...
        'axis image']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'string','關閉',...
    'position',[100 50 50 20],...
    'callback','close'); 

實例83：特殊的圖像顯示技術

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','實例83');
h1=axes('parent',h0,...
    'position',[0.25 0.45 0.5 0.5],...
    'visible','off');
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','顏色條',...
    'position',[30 120 50 20],...
    'callback',[...
        'cla,',...
        'I = imread(''plane.jpg'');,',...
        'imshow(I),',...
        'colorbar']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'position',[100 120 50 20],...
    'string','單幀顯示',...
    'callback',[...
        'cla,',...
        'load mri,',...
        'imshow(D(:,:,:,7))']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','動畫顯示',...
    'position',[30 60 50 20],...
    'callback',[...
        'cla,',...
        'load mri,',...
        'montage(D,map),',...
        'mov=immovie(D,map);,',...
        'colormap(map),',...
        'movie(mov)']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','紋理映射',...
    'position',[170 60 50 20],...
    'callback',[...
        'cla,',...
        '[x,y,z] = cylinder;,',...
        'I = imread(''girls.jpg'');,',...
        'warp(x,z,y,I);']);
b5=uicontrol('parent',h0,...
    'units','points',...
    'tag','b5',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','關閉',...
    'position',[100 60 50 20],...
    'callback','close');
b6=uicontrol('parent',h0,...
    'units','points',...
    'tag','b6',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','多幀顯示',...
    'position',[170 120 50 20],...
    'callback',[...
        'cla,',...
        'load mri,',...
        'montage(D,map)']);

實例84：圖像的幾何操作

h0=figure('toolbar','none',...
    'position',[198 56 400 468],...
    'name','實例84');
h1=axes('parent',h0,...
    'position',[0.25 0.45 0.5 0.5],...
    'visible','off');
I=imread('plane.jpg','jpg');
imshow(I)
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','圖像旋轉',...
    'position',[200 120 50 20],...
    'callback',[...
        'cla,',...
        'k=str2num(get(e1,''string''));,',...
        'I=imread(''plane.jpg'',''jpg'');,',...
        'J=imrotate(I,k,''bilinear'');,',...
        'imshow(J)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','圖像剪切',...
    'position',[200 80 50 20],...
    'callback',[...
        'cla,',...
        'imshow plane.jpg,',...
        'I=imcrop;,',...
        'imshow(I)']);
  b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','關閉',...
    'position',[120 30 50 20],...
    'callback','close');
e1=uicontrol('parent',h0,...
    'units','points',...
    'tag','e1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','edit',...
    'horizontalalignment','right',...
    'position',[50 80 100 20]);
t1=uicontrol('parent',h0,...
    'units','points',...
    'tag','t1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','text',...
    'string','請輸入旋轉角度（0～90）度',...
    'fontsize',12,...
    'position',[40 100 130 20]);

實例85：拉個朗日插值