基于MATLAB的数字图像运算

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1、点运算：线性点运算：»a=imread(rliftingbody.png,);»subplot(3,2,1);imshow(a);»bl=a+50;»subplot(3,2,2);imshow(b1);»b2二1.2*a;»subplot(323);imshow(b2);»b3=0.6*a;»subplot(3,2,4)；imshow(b3);»b4=-double(a)+255;»subplot(3,2,5);imshow(b4);非线性点运算;»a=imread(,cameraman.tif)

2、;»subplot(1,3J);imshow(a);»x=l:255;»y=x+x.*(255・x)/255;»subplot(l,3,2);plot(x,y);»bl=double(a)+0.006*double(a).*(255-double(a));»subplot(l,3,3);imshow(uint8(b1));300图像代数运算：加法运算：»i=imread(,rice.png,);»subplot(2,2,1);imshow(i);»j=imread(fcameraman.tif);

3、»subplot(2,2,2);imshow(j);»k=imadd(i,j,'uint16');»subplot(223);imshow(k,[]);»f=imadd(i,45);»subplot(2,2,4);imshow(f)；利用imnoise()对噪声进行相加运算:»a=imread(feight.tif);»a1=imnoise(a/gaussian,0.006);»a2=imnoise(a/gaussian,0.006);»a3=imnoise(a/gaussianfA0.0

4、06);»a4=imnoise(a/gaussian,0.006);»k=imlincomb(0.25,a1,0.25,a2,0.25,a3,0.25,a4);»subplot(1,3,1);imshow(a);»subplot(1,3,2);imshow(a1);»subplot(l,3,3)；imshow(k);图像减法运算：»i=imread(,cameraman.tif);»subplot(2,2,1);imshow(i);»back=imopen(i,strel(,disk15))

5、;»subplot(222);imshow(back);»i1=imsubtract(i,back);»subplot(223);imshow(il);»i2=imsubtract(i,45);»subplot(2,2,4);imshow(i2);图像乘法运算:»i^mreadf^utumn.tif);»subplot(2,2,l);»imshow(i);»il6=uintl6(i);»j=immultiply(il6,il6);»subplot(2,2,2);imshow(j);»j2=immu

6、ltiply(i,0.5);»subplot(223);imshow(j2);图像除法运算：»i=imread(rautumn.tif);»subplot(2,2,1);imshow(i);»back=imopen(i,strelCdisk15));»il=imdivide(i.back);»subplot(2,2,2);imshow(i1,[J);»i2=imdivide(i,2);»subplot(2,2,3)；imshow(i2);绝对值运算:»i=imread(fcameraman.ti

7、f);»subplot(1,3,1);imshow(i);»il=filter2(fspecial(,gaussian,),i);»j=uint8(il);»subplot(1,3,2);imshow(j);»k=imabsdiff(i,j);»subplot(l,3,3);imshow(k,[]);线性组合运算：»i=imread(rcameraman.tif);»j=imlincomb(2.5,i);»subplot(2,2,1);imshow(i);»subplot(2,2,2);imsho

8、w(j);»j1=uint8(filter2(fspecial('gaussian,)»i))；»k=imlincomb(l,i,・l,jl,128);»subplot(2,2,3)；irnshow(k);»j2=imread(,cameraman.tif);»k2=imlincomb(l,i,1,j2,'uint16');»subplot(224);imshow(k2,H);图像求补运算:»bw=imread(,autumn.tif);»bw2二imcomplement(bw);