图像算术运算及逻辑运算

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1、图像算术运算代数运算函数:Imabsdiff两幅图像的绝对差值Imadd两幅图像的加法Imcomplement补足一幅图像(反像－余数)Imdivide两幅图像的除法Imlincomb两幅图像的线性组合Immultiply两幅图像的乘法Imsubtract两幅图像的减法Z=IMLINCOMB(K1,A1,K2,A2,...,Kn,An)即：计算Z＝K1*A1+K2*A2+...+Kn*An例子：%%f3.2（线性点运算）rice=imread('rice.png');I=double(rice);J=

2、I*0.43+60;rice2=uint8(J);subplot(1,2,1),imshow(rice);subplot(1,2,2),imshow(rice2);%%f3.7_8（加法运算：两图像相加）i=imread('rice.png');j=imread('cameraman.tif');k=imadd(i,j);subplot(1,3,1),imshow(i);subplot(1,3,2),imshow(j);subplot(1,3,3),imshow(k);%%imshow(k);%%f3

3、.9（加法运算：增加亮度值）RGB=imread('cameraman.tif');RGB2=imadd(RGB,50);RGB3=imadd(RGB,100);subplot(1,3,1),imshow(RGB);subplot(1,3,2),imshow(RGB2);subplot(1,3,3),imshow(RGB3);%%f3.10（减法运算—减背景）rice=imread('rice.png');background=imopen(rice,strel('disk',15));rice2=i

4、msubtract(rice,background);subplot(1,2,1),imshow(rice);subplot(1,2,2),imshow(rice2);%%f3.10（减法运算—图像相减）%要求图像尺寸相同rice=imread('rice.png');cameraman=imread('cameraman.tif');c=imsubtract(rice,cameraman);subplot(1,3,1),imshow(rice);subplot(1,3,2),imshow(camer

5、aman);subplot(1,3,3),imshow(c);%采用线性组合函数实现加减运算rice=imread('rice.png');cameraman=imread('cameraman.tif');c=imlincomb(1.0,rice,-1.0,cameraman);subplot(1,3,1),imshow(rice);subplot(1,3,2),imshow(cameraman);subplot(1,3,3),imshow(c);%%f3.11（乘法运算：j,k取值不同）i=imr

6、ead('moon.tif');j=immultiply(i,1.2);k=immultiply(i,2);subplot(1,3,1),imshow(i);subplot(1,3,2),imshow(j);subplot(1,3,3),imshow(k);%%f3.12(除法运算：j,k,l取值不同）rice=imread('rice.png');i=double(rice);j=i*0.43+90;k=i*0.1+90;l=i*0.01+90;rice2=uint8(j);rice3=uint8(

7、k);rice4=uint8(l);ip=imdivide(rice,rice2);ik=imdivide(rice,rice3);il=imdivide(rice,rice4);subplot(3,3,1);imshow(rice2);subplot(3,3,2);imshow(rice3);subplot(3,3,5);imshow(rice4);subplot(3,3,6);imshow(il,[]);subplot(3,3,7);imshow(ip,[]);subplot(3,3,8);ims

8、how(ik,[]);subplot(3,3,9);imshow(il,[]);%%f3.13(四则运算1：imadd_imdivide混合用法）i=imread('rice.png');i2=imread('cameraman.tif');l=imadd(i,i2);k=imdivide(imadd(i,i2),6);imshow(l);figure,imshow(k,[]);%%f3.13(四则运算2：imlincomb用法）X=imread('ri