1、 if length(size(pic)=3 %判断图片的维数,统一为灰度图片 pic=rgb2gray(pic);pic=(pic127); %转化为二值图片pic=xylimit(pic); %图片区域的第一次边界限定%第一阶段%m=size(pic,1);Ycount=zeros(1,m);for i=1:m Ycount(i)=sum(pic(i,:);lenYcount=length(Ycount);Yflag=zeros(1,lenYcount);for k=1:lenYcount-2 if Ycount(k)3 & Ycount(k+1) Ycount(k+2)3 Yflag(k
2、)=1; endfor k=lenYcount:1+2 Ycount(k-1) Ycount(k-2)Yflag2=0 Yflag(1:end-1);Yflag3=abs(Yflag-Yflag2); %做差分运算,row=find(Yflag3=1); %找突变位置row=1 row m; %调整突变位置点row1=zeros(1,length(row)/2); %截取图像的起始位置向量row2=row1; %截取图像的终止位置向量length(row) if mod(k,2)=1; %奇数为起始 row1(k+1)/2)=row(k); else %偶数为终止 row2(k/2)=row(
3、k);pic2=pic(row1(1):row2(1),: %截取第一列字符alpha=1024/size(pic2,2); %计算放缩比例pic2=imresize(pic2,alpha); %调整第一列字符图片大小,作为基准for k=2:length(row)/2 pictemp=imresize(pic(row1(k):row2(k),:),size(pic2,1) size(pic2,2); pic2=cat(2,pic2,pictemp); %横向连接图像块pic=xylimit(pic2); %限定图像区域%第二阶段%,n=size(pic);Xcount=zeros(1,n);
4、for j=1:n Xcount(j)=sum(pic(:,j);lenXcount=length(Xcount);Xflag=zeros(1,lenXcount);lenXcount-2 if Xcount(k) Xcount(k+1) Xcount(k+2) Xflag(k)=1;for k=lenXcount: Xcount(k-1) Xcount(k-2)Xflag2=0 Xflag(1:Xflag3=abs(Xflag-Xflag2);,col=find(Xflag3=1);col=1 col size(pic,2);coltemp=col(2:end)-col(1:end-1);,
5、ind=find(coltemp0);col1=zeros(1,length(col)/2);col2=col1;length(col) if mod(k,2)=1 col1(k+1)/2)=col(k); else col2(k/2)=col(k);picnum2=length(col)/2;piccell2=cell(1,picnum2);picnum2 piccell2k=pic(:,col1(k):col2(k); piccell2k=xylimit(piccell2k); piccell2k=imresize(piccell2k,128 128);%显示提取出的字符,每行最多输出8个
6、字符if mod(picnum2,8) rownum=ceil(picnum2/8)+1;else rownum=picnum2/8; subplot(rownum,8,k); imshow(piccell2k);%函数xylimit如下:function newpic=xylimit(pic)%function name:XYLIMIT% Input pic:binary image%Output newpic:%用途:对二值图像边界进行限定,要求图像是黑底白图%example:% % pic=imread(数字字符.jpg% % pic=rgb2gray(pic);% % pic=(pic
7、% % pic=xylimit(pic);% % imshow(pic);m,n=size(pic);%纵向扫描% %获取每一行的像素点个数Ybottom=m; %底部定界Yvalue=Ycount(Ybottom);while(Yvalue3) Ybottom=Ybottom-1; Yvalue=Ycount(Ybottom);Yceil=1; %顶部定界Yvalue=Ycount(Yceil); Yceil=Yceil+1; Yvalue=Ycount(Yceil);%横向扫描% %获取每一列的像素点个数Xleft=1; %左侧定界Xvalue=Xcount(Xleft);while(Xvalue2) Xleft=Xleft+1; Xvalue=Xcount(Xleft);Xright=n; %右侧定界Xvalue=Xcount(Xright); Xright=Xright-1; Xvalue=Xcount(Xright);%截取图片%newpic=pic(Yceil:Ybottom,Xleft:Xright);(输入的样品图片1)(输出结果1)(输入的样品图片2)(输出结果2)(输入的样品图片3)(输出结果3)
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