帧差法.rar_cloudv52_帧差分法_帧差分运动_帧差法检测_运动检测

function [left,top,width,height] = TrackTargetPos(frame,k) %构成四维空间,变成(行，列，颜色，第几帧) pixels1 = double(cat(4,frame{k}))/255; pixels2 = double(cat(4,frame{k+1}))/255; pixel1(:,:,1) = (rgb2gray(pixels1(:,:,:,1))); pixel2(:,:,1) = (rgb2gray(pixels2(:,:,:,1))); rows=240; %帧高 cols=320; %帧宽 %取两帧之差 d(:,:,k)=(abs(pixel2-pixel1)); k=d(:,:,k); bw(:,:,k) = im2bw(k, .2); cou=1; %计算一帧中检测目标的高度坐标（tpln高度上坐标，toplen高度下坐标） for h=1:rows for w=1:cols if(bw(h,w,k)>0.5) toplen = h; if (cou == 1) tpln=toplen; end cou=cou+1; break end end end coun=1; %计算一帧中检测目标的宽度坐标（lftln宽度左坐标，leftsi宽度右坐标） for w=1:cols for h=1:rows if(bw(h,w,k)>0.5) leftsi = w; if (coun == 1) lftln=leftsi; coun=coun+1; end break end end end left=lftln; top=tpln; width=leftsi-lftln; %检测目标的宽度 height=toplen-tpln; %检测目标的高度