基于Matlab实现图像捕捉并绘图（源码+素材+报告）.rar

function bwImg = getBw(Image) %功能:由灰度图转为二值图 % 阈值分割,基于双峰灰度直方图寻找峰谷,其中包含平滑直方图的工作 hist1=imhist(Image); hist2=hist1; iter=0; while 1 [is,peak]=Bimodal(hist1); if is==0 hist2(1)=(hist1(1)*2+hist1(2))/3; for j=2:255 hist2(j)=(hist1(j-1)+hist1(j)+hist1(j+1))/3; end hist2(256)=(hist1(255)+hist1(256)*2)/3; hist1=hist2; iter=iter+1; if iter>1000 break; end else break; end end [~,pos]=min(hist1(peak(1):peak(2))); thresh=pos+peak(1); if isempty(thresh) bwImg = imbinarize(Image); return end bwImg=zeros(size(Image)); bwImg(Image>thresh)=1; % 如果输出的图像全黑或全白则该方法失效的处理 if all(bwImg == 1) | all(bwImg == 0) bwImg = imbinarize(Image); return end return function [is,peak]=Bimodal(histgram) count = 0; peak(3) = 0; for i=2:255 if histgram(i-1)<histgram(i) && histgram(i+1)<histgram(i) count=count+1; peak(count)=i; if count>2 is=0; return; end end end if count==2 is=1; else is=0; end end end