tt.m

这是matlab灰度差程序

mov=mpgread('E:\yuzhi.mpg'); %读入存在E盘的视频
fnum=size(mov,2); %读取电影的祯数，mov为1*temp
for i=1:fnum
[r,g,b]=mpgread('E:\yuzhi.mpg',i);
A(:,:,1)=r;
A(:,:,2)=g;
A(:,:,3)=b;
B=rgb2gray(A);
C(:,:,i)=B;
end                 %读入视频的灰度
for i=2:fnum
F(:,:,i)=abs(C(:,:,i)-C(:,:,i-1));
end                 %得到视频的灰度差
[x,y,frems]=size(F);
for n=1:fnum
    for i=1:(x-1)
        for j=1:(y-1)
          F(i,j,n)=F(i,j,n)+F(i+1,j+1,n);
        end
    end
    D(:,n)=F(i,j,n)/(x*y);
end                %得到视频的总的帧差
for i=2:fnum
 if D(:,i)<D(:,i-1)
    D(:,i)=D(:,i-1);
  end
end                %得到最大的灰度差
T=D(fnum);%保存到T