How to get accumulated motion image in a video?

Question

Ramya Sampath 2012-10-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/50781-how-to-get-accumulated-motion-image-in-a-video

I need accumulated image of a video... I tried with the following code.... But i get wrong output... Can anyone help me and findout error in my code....

     %Testing the input video file 
     %Accumulated motion%
    [FileName PathName] = uigetfile('*.avi','Select a video file for testing','D:\ME PROJECT\daria bend.avi');
    file = fullfile(PathName,FileName);
    robj = mmreader(file);
    vidfrm = read(robj);
     %frm=double(vidfrm);
    dur = robj.Duration
    numF = robj.NumberOfFrames
    %Computation of ami
     m=0;
    for k=2:numF;
        f1=vidfrm(:,:,:,k);
        imshow(f1);
        h1=getframe;
        %[x,map]=frame2im(h1);
        g1=rgb2gray(f1);
        f2=vidfrm(:,:,:,k-1);
        imshow(f2);
        h2=getframe;
        %[x1,map1]=frame2im(h2);
        g2=rgb2gray(f2);
        g=imabsdiff(g1,g2);
        m=m+g;
    end
    m;
    figure(1),imshow(m);
     ami=m/numF;
     figure(2),imshow(ami);
    Sorry i cannot upload video now.. use any grayscale video like weizmann dataset for it... Actually the figure(2) have to dipaly some accumulated o/p when it is divided by total num of frames.. But i get ly black screen... Pls help me...!