matlab图像处理小结.docx

matlab图像处理小结

第一篇：matlab图像处理小结1.function[center,r]=solve_circle(pt1,pt2,pt3)2.%Effect:solvethecirclewhichacrosspoints'pt1','pt2'and'pt3'3.%Inputs:4.%pt1,pt2,pt3:[x,y]5.%center:thecirclecenter[x0;y0]6.%r:theradiusofthecircle7.%Author:Sudongcaiat2012/1/28.A=zeros(2,2);B=zeros(2,1);9.[A(1,:),B(1)]=circle2line(pt1,pt2);10.[A(2,:),B(2)]=circle2line(pt2,pt3);11.center=AB;12.r=norm(pt1'(y2^2+y2^2)18.%(a-x2)^2+(b-y2)^2=r^2|19.%Inputs:20.%pt1,pt2:[x1,y1],[x2,y2]21.%Outputs:22.%A:2[x1-x2,y1-y2]23.%B:(x1^2+y1^2)pt2);26.B=norm(pt1)^2-norm(pt2)^2;closeall;clear;clc;>>i=imread('rice.png');%>>imshow(i);>>background=imopen(i,strel('disk',15));>>i2=imsubtract(i,background);%>>figure,imshow(i2);>>i3=imadjust(i2,stretchlim(i2),[01]);%>>figure,imshow(i3);>>level=graythresh(i3);>>bw=im2bw(i3,level);%>>figure,imshow(bw);>>[labeled,numobjects]=bwlabel(bw,4);graindata=regionprops(labeled,'all');closeall;clear;clc;i=imread('rice.png');background=imopen(i,strel('disk',15));i2=imsubtract(i,background);i3=imadjust(i2,stretchlim(i2),[01]);level=graythresh(i3);bw=im2bw(i3,level);[labeled,numobjects]=bwlabel(bw,4);data=regionprops(labeled,'all');%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%2006.6.2closeall;clear;clc;>>i=imread('r.jpg');%>>figure,imshow(i);>>imgray=rgb2gray(i);>>figure,imshow(imgray)>>background=imopen(imgray,strel('disk',15));>>i2=imsubtract(imgray,background);%>>figure,imshow(i2);>>i3=imadjust(i2,stretchlim(i2),[01]);%>>figure,imshow(i3);>>level=graythresh(i3);>>bw=im2bw(i3,level);%>>figure,imshow(bw);>>imnobord=imclearborder(bw,4);%>>figure,imshow(imnobord);>>[labeled,numobjects]=bwlabel(bw,4);>>rgb_label=label2rgb(labeled,@spring,'c','shuffle');>>figure,imshow(rgb_label);>>graindata=regionprops(labeled,'all');holdon;fork=1:numobjectslab=sprintf('%d',k);text(graindata(k).Centroid(1),graindata(k).Centroid(2),lab,'Color','k');endholdoff;%剔除碎米粒>>idxdown=find([graindata.Area][lab_little,num_little]=bwlabel(little,4);rgb_little=label2rgb(lab_little,@spring,'c','shuffle')