大津阈值分割法(共5页).docx

精选优质文档-倾情为你奉上clccleary=imread(mat4.ico);a=rgb2gray(y);L=256; Ps = zeros(L,1); nk=zeros(L,1); row,col=size(y); n=row*col; for i = 1:row for j = 1:col num = double(y(i,j)+1; nk(num) = nk(num)+1; end end for i=1:L Ps(i)=nk(i)/n; end %figure(4),imhist(hist); %p=imhist(hist); figureimshow(a)count=imhist(a);m,n=size(a);A=m*n;L=256;count=count/A;for i=1:L if count(i)=0 st=i-1; break; en