Video - Motion Detection

There are many approaches for motion detection in a continuous video stream. All of them are based on comparing of the current video frame with one from the previous frames or with something that we'll call background.

as you can see from my implementation, the results are not very promising, because of the colors in the video stream. the next approach is using image and converting to gray scale.

here the code for background subtraction using video frames:

clear all
close all
clc;
disp('Testing Purposes Only....');
fin = 'sampleVideo.avi';
fout = 'test2.avi';
fileinfo = aviinfo(fin);
nframes = fileinfo.NumFrames;
aviobj = avifile(fout, 'compression', 'none', 'fps',fileinfo.FramesPerSecond);
for i = 2:nframes %1
%Read frames from input video
mov_in = aviread(fin,i);
im_in = frame2im(mov_in);
%Do processing on each frame of the video
%----------------------------------------------------------------------

mov_in2 = aviread(fin,i-1); %or 1 for the first frame
im_in2 = frame2im(mov_in2);
background = imopen(im_in2,strel('disk',15)); %get the background image
I2= imsubtract(im_in,background);
im_out =I2;
%----------------------------------------------------------------------
%Write frames to output video
frm = im2frame(im_out);
aviobj = addframe(aviobj,frm);
%i %Just to display frame number
end;
%Don't forget to close output file
aviobj = close(aviobj);
msgbox('DONE');
return;

results: