h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','實例71');
h1=axes('parent',h0,...
    'position',[0.3 0.45 0.5 0.5],...
    'visible','off');
P=phantom(256);
imshow(P)
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','變換一',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 100 50 20],...
    'callback',[...
        'cla,',...
        'k=1;,',...
        'theta1=0:10:170;,',...
        'R1=radon(P,theta1);,',...
        'imagesc(R1),',...
        'colormap(hot),',...
        'colorbar']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','變換二',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[100 100 50 20],...
    'callback',[...
        'cla,',...
        'k=2;,',...
        'theta2=0:5:175;,',...
        'R2=radon(P,theta2);,',...
        'imagesc(R2),',...
        'colormap(hot),',...
        'colorbar']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'string','變換三',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 100 50 20],...
    'callback',[...
        'cla,',...
        'k=3;,',...
        'theta3=0:2:178;,',...
        'R3=radon(P,theta3);,',...
        'imagesc(R3),',...
        'colormap(hot),',...
        'colorbar']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'string','原始圖像',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[50 50 70 30],...
    'callback',[...
        'cla,',...
        'if k==1,',...
        'I1=iradon(R1,10);,',...
        'imshow(I1),',...
        'end,',...
        'if k==2,',...
        'I2=iradon(R2,5);,',...
        'imshow(I2),',...
        'end,',...
        'if k==3,',...
        'I3=iradon(R3,2);,',...
        'imshow(I3),',...
        'end']);        
b5=uicontrol('parent',h0,...
    'units','points',...
    'tag','b5',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[150 50 70 30],...
    'callback','close');