fore ground and background subtraction

clear all;

close all;

clc;

threshold = 0.05;

file = 'Video.avi';

vfr = vision.VideoFileReader(file,'ImageColorSpace','RGB');

%vfr = vision.VideoFileReader(file, 'ImageColorSpace', 'gray');

imagebox = step(vfr);

backgnd = imagebox;

g_img = rgb2gray(backgnd);

imagesize = size(backgnd);

width = imagesize(2);

height = imagesize(1);

foregnd = zeros(height, width);

while ~isDone(vfr)

   imagebox1 = step(vfr);

   foregndgray= rgb2gray(imagebox1);

   f_gnddiff= abs(double(foregndgray) - double(g_img));

  for i=1:width

for j=1:height

if ((foregnddiff(j,i) > threshold))

     foregnd(j,i) = 255;

else

     foregnd(j,i) = 0;    

end

end

end

g_img = foregndgray;

figure(1),subplot(3,1,1),imshow(imagebox1)

subplot(3,1,2),imshow(foregndgray)

subplot(3,1,3),imshow(uint8(foregnd))

end

locate points in an image

NumberOfimages=4;       %chose the number of images you want to give input

srcFiles = dir('E:\frames12\*.png');  

for i = 1 : NumberOfimages

filename = strcat('E:\frames12\',srcFiles(i).name);

 I = imread(filename);  

 faceDetector = vision.CascadeObjectDetector();

fbox= step(faceDetector,I);

videoOutFace = insertObjectAnnotation(I,'rectangle',fbox,'Face');

%figure, imshow(videoOutFace), title('Detected face');

e=imcrop(I,fbox);

%figure,imshow(e);

imwrite(e,strcat('E:\frames13\',int2str(i),'.png'));

 imwrite(e,'acquired.jpg');

  a=imread('acquired.jpg');

I=rgb2gray(a);

%cornerDetector = vision.CornerDetector('Method','Minimum eigenvalue (Shi & Tomasi)','MaximumCornerCount',120);I = rgb2gray(a);

cornerDetector = vision.CornerDetector('Method','Local intensity comparison (Rosten & Drummond)','MaximumCornerCount',250);

pts = step(cornerDetector, I);

drawMarkers = vision.MarkerInserter('Shape','Plus','BorderColor','Custom','Size',2);

J = repmat(I,[1 1 3]);

J = step(drawMarkers, J, pts);

%imshow(J); title ('Corners detected in a grayscale image');

%imwrite(image,FullFileName,'png');

    imwrite(J,strcat('E:\frames12\frames\',int2str(i),'.png'));

end