matlab program to track persons in live video

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I am new to Matlab. I need to track persons through live cam.
clc;
close all;
clear all;
video = VideoReader('rhinos.avi'); %in place of aviread
%nframes = length(video);
nframes=video.NumberOfFrames;
for i=1:nframes
mov(i).cdata=read(video,i)
%creating '.cdata' field to avoid much changes to previous code
end
temp = zeros(size(mov(1).cdata));
[M,N] = size(temp(:,:,1));
for i = 1:10
temp = double(mov(i).cdata) + temp;
end
imbkg = temp/10;centroidx = zeros(nframes,1);
centroidy = zeros(nframes,1);
predicted = zeros(nframes,4);
actual = zeros(nframes,4);
R=[[0.2845,0.0045]',[0.0045,0.0455]'];
H=[[1,0]',[0,1]',[0,0]',[0,0]'];
Q=0.01*eye(4);
P = 100*eye(4);
dt=1;
A=[[1,0,0,0]',[0,1,0,0]',[dt,0,1,0]',[0,dt,0,1]'];
kfinit = 0;
th = 38;
for i=1:nframes
imshow(mov(i).cdata);
hold on
imcurrent = double(mov(i).cdata);
diffimg = zeros(M,N);
diffimg = (abs(imcurrent(:,:,1)-imbkg(:,:,1))>th) ...
| (abs(imcurrent(:,:,2)-imbkg(:,:,2))>th) ...
| (abs(imcurrent(:,:,3)-imbkg(:,:,3))>th);
labelimg = bwlabel(diffimg,4);
markimg = regionprops(labelimg,['basic']);
[MM,NN] = size(markimg);
for nn = 1:MM
if markimg(nn).Area > markimg(1).Area
tmp = markimg(1);
markimg(1)= markimg(nn);
markimg(nn)= tmp;
end
end
bb = markimg(1).BoundingBox;
xcorner = bb(1);
ycorner = bb(2);
xwidth = bb(3);
ywidth = bb(4);
cc = markimg(1).Centroid;
centroidx(i)= cc(1);
centroidy(i)= cc(2);
hold on
rectangle('Position',[xcorner ycorner xwidth ywidth],'EdgeColor','b');
hold on
plot(centroidx(i),centroidy(i), 'bx');
kalmanx = centroidx(i)- xcorner;
kalmany = centroidy(i)- ycorner;
if kfinit == 0
predicted =[centroidx(i),centroidy(i),0,0]' ;
else
predicted = A*actual(i-1,:)';
end
kfinit = 1;
Ppre = A*P*A' + Q;
K = Ppre*H'/(H*Ppre*H'+R);
actual(i,:) = (predicted + K*([centroidx(i),centroidy(i)]' - H*predicted))';
P = (eye(4)-K*H)*Ppre;
hold on
rectangle('Position',[(actual(i,1)-kalmanx)...
(actual(i,2)-kalmany) xwidth ywidth],'EdgeColor','r','LineWidth',1.5);
hold on
plot(actual(i,1),actual(i,2), 'rx','LineWidth',1.5);
drawnow;
end
pls help to me . i don't know how to do in webcam

Accepted Answer

Dima Lisin
Dima Lisin on 19 Oct 2015
If your camera is not moving, try the following example.
If your camera is moving, then try this example.

More Answers (1)

Image Analyst
Image Analyst on 17 Oct 2015

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