数字图像处理实验课程序.doc

时间:2014-07-07 07:58:57
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文件名称:数字图像处理实验课程序.doc

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更新时间:2014-07-07 07:58:57

数字图像处理

图像反转 f=imread('breast.tif'); imshow(f) f1=imadjust(f,[0 1],[1 0]); figure,imshow(f1) 对数运算 f=imread('12.tif'); imshow(f) F=fft2(f); s=abs(F); h=log(1+s); FC=fftshift(h); figure,imshow(FC,[]) 直方图均衡化 f=imread('pollen.tif'); imshow(f) h=imhist(f); figure,stem(h,'.') g=histeq(f,256); figure,imshow(g) figure,imhist(g) 低通滤波(课本P96) f=imread('bld.tif'); imshow(f); f1=fftshift(f); g=abs(f1); imshow(g,[]); f=imread('bld.tif'); f=im2double(f); imshow(f); v=[1/9,1/9,1/9,1/9,1/9,1/9,1/9,1/9,1/9]; g1=imfilter(f,v); figure,imshow(g1); f=imread('bld.tif'); imshow(f); f1=fftshift(f); g=abs(f1); imshow(g,[]); f=imread('bld.tif'); f=im2double(f); imshow(f); h = fspecial('average',[9 9]); g1=imfilter(f,h); figure,imshow(g1) h = fspecial('average',[15 15]); g2=imfilter(f,h); figure,imshow(g2) 拉普拉斯滤波(课本P102) f=imread('moon.tif'); imshow(f); f1=fftshift(f); g=abs(f1); imshow(g,[]); f=imread('moon.tif'); f=im2double(f); imshow(f); h = fspecial('laplacian',0); g1=imfilter(f,h); figure,imshow(g1) 显示目的标定后的图像 f=imread('moon.tif'); imshow(f); f=im2double(f); imshow(f); h = [0,1,0;1,-4,1;0,1,0]; g1=imfilter(f,h); figure,imshow(g1,[]) 拉普拉斯增强 f=imread('moon.tif'); imshow(f) f=im2double(f); imshow(f); h = [0,-1,0;-1,5,-1;0,-1,0]; g1=imfilter(f,h); figure,imshow(g1) 理想低通(课本P145) f=imread('bld.tif'); imshow(f) [M,N]=size(f); F=fft2(f); H=lpfilter('ideal',M,N,50); G=H.*F; g=real(ifft2(G)); figure,imshow(g,[]) 高通 f=imread('bld.tif'); imshow(f) [M,N]=size(f); F=fft2(f); H=1-lpfilter('ideal',M,N,50); G=H.*F; g=real(ifft2(G)); figure,imshow(g,[]) 空间域转换成频域 f=imread('bld.tif'); f=im2double(f); imshow(f); h = [-1,-1,-1;-1,9,-1;-1,-1,-1]; H=freqz2(h,100,100); H1=ifftshift(H); figure,mesh(abs(H1)); a=max(max(H1)); b=min(min(H1)) 将花心填充呈黄色 f=imread('rgbr.tif'); imshow(f) [M,N]=size(f); for i=1:1:M for j=1:1:N if f(i,j)>=220 fb(i,j)=0; else if f(i,j)>=198&f(i,j)<220 fb(i,j)=50; else if f(i,j)<=198 fb(i,j)=f(i,j); end end end end end fb=im2uint8(fb); f2=cat(3,f,f,fb); figure,imshow(fb); figure,imshow(f2) 将月球边缘填充成黄色 (1)f=imread('moon.tif'); imshow(f) [M,N]=size(f); for i=1:1:M for j=1:1:N fb(i,j)=f(i,j); fr(i,j)=0; fg(i,j)=0; end end f2=cat(3,fr,fg,fb); figure,imshow(f2); w=[0 -1 0;-1 5 -1;0 -1 0]; g=imfilter(f2,w); figure,imshow(g) [M,N]=size(g); for i=1:1:M for j=1:1:N if g(i,j)<=100 gr(i,j)=g(i,j); gg(i,j)=g(i,j); gb(i,j)=g(i,j); else if 100


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