Moving target detection (inter-frame difference method) __ Moving target detection

Before the computer vision class, the teacher demonstrated a moving target detection program. Feel fun, go back and write a.
Moving target detection based on frame difference method + threshold (thresholds). The median filter was processed before the detection, and the threshold value was set manually. Effect of the general bar.

Clear all;
Close all;
CLC;
Mov=videoreader (' Classroom.avi ');
N=mov. Numberofframes;


For I=2:n
    Frame=read (mov,i);
    Pframe=read (mov,i-1);
    If Ndims (frame) ==3
        X=rgb2gray (frame);
    else
        X=frame;
    End
    If Ndims (pframe) ==3
        Y=rgb2gray (pframe);
    else
        Y=pframe;
    End
    subplot (1,2,1);
    Imshow (pframe,[]);
     Title (sprintf ('%d frame ', i-1))
    % difference Algorithm
    x=medfilt2 (x);
    Y=medfilt2 (y);
    N=im2double (x);
    P=im2double (y);

    C=n-p;
    C=MEDFILT2 (c);
    t=10/256;

    C (ABS (c) >=t) =255;
    C (ABS (c) <t) =0;
    C=logical (c);

    X1=pframe (:,:, 1);
    X1 (c) =0;
    X2=pframe (:,:, 2);
    X2 (c) =255;
    X3=pframe (:,:, 3);
    X3 (c) =0;
    Xc=cat (3,x1,x2,x3);  

    Subplot (1,2,2);
    Imshow (xc,[]);
    Title (sprintf ('%d frame ', i-1)) End

Code and test data downloads