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1、Matlab图像处理函数汇总（三） (2009-10-1313:42:35)转载▼标签： 杂谈60.imnoise功能:增加图像的渲染效果.语法:J=imnoise(I,type)J=imnoise(I,type,parameters)举例I=imread('eight.tif');J=imnoise(I,'salt&pepper',0.02);imshow(I)figure,imshow(J)相关命令:rand61.impixel功能:确定像素颜色值.语法:P=impixel(I)P=impixel(X,map)P
2、=impixel(RGB)P=impixel(I,c,r)P=impixel(X,map,c,r)P=impixel(RGB,c,r)[c,r,P]=impixel(...)P=impixel(x,y,I,xi,yi)P=impixel(x,y,X,map,xi,yi)P=impixel(x,y,RGB,xi,yi)[xi,yi,P]=impixel(x,y,...)举例RGB=imread('flowers.tif');c=[12146410];r=[104156129];pixels=impixel(RGB,c,
3、r)pixels=615910125324002373744相关命令:improfile,pixval62.improfile功能:沿线段计算剖面图的像素值.语法:c=improfilec=improfile(n)c=improfile(I,xi,yi)c=improfile(I,xi,yi,n)[cx,cy,c]=improfile(...)[cx,cy,c,xi,yi]=improfile(...)[...]=improfile(x,y,I,xi,yi)[...]=improfile(x,y,I,xi,yi,n)
4、[...]=improfile(...,method)举例I=imread('alumgrns.tif');x=[35338346103];y=[25325017148];improfile(I,x,y),gridon相关命令:impixel,pixval63.imread功能:从图形文件中读取图像.语法:A=imread(filename,fmt)[X,map]=imread(filename,fmt)[...]=imread(filename)[...]=imread(...,idx)(TIFFonly)[...
5、]=imread(...,ref)(HDFonly)[...]=imread(...,'BackgroundColor',BG)(PNGonly)[A,map,alpha]=imread(...)(PNGonly)举例[X,map]=imread('flowers.tif',6);info=imfinfo('skull.hdf');[X,map]=imread('skull.hdf',info(4).Reference);bg=[25500];A=imread('image.png','BackgroundColor
6、',bg);[A,map,alpha]=imread('image.png');相关命令:imfinfo,imwrite,fread,double,uint8,uint1664.imresize功能:改变图像大小.语法:B=imresize(A,m,method)B=imresize(A,[mrowsncols],method)B=imresize(...,method,n)B=imresize(...,method,h)65.imrotate功能:旋转图像.语法:B=imrotate(A,angle,method)
7、B=imrotate(A,angle,method,'crop')举例I=imread('ic.tif');J=imrotate(I,-4,'bilinear','crop');imshow(I)figure,imshow(J)相关命令:imcrop,imresize66.imshow功能:显示图像.语法:imshow(I,n)imshow(I,[lowhigh])imshow(BW)imshow(X,map)imshow(RGB)imshow(...,display_option)imshow(x,y,A,...)
8、imshowfilenameh=imshow(...)相关命令:getimage,imread,iptgetpref,iptsetpref,subimage,truesize,warp67.imwrite功能:把图像写入图形文件中.语法:imwrite(A,filename,fmt)imwrite(X,map,filename,fmt)imwr
