How can I get median filtered background image from sequence of video frames? I am trying to store the corresponding pixels values of sequence of frames in respective cells and then to find the median value, but I cannot get values in cells.

files = dir('*.JPG')

img=imread(files(1).name);

img_gray=rgb2gray(img);

E=cell(size(img_gray));

for k = 1:numel(files)

    rgb = imread(files(k).name);

    gry=rgb2gray(rgb);

for i=1:1:size(gry,1)

for j=1:1:size(gry,2)

    E{i,j}=[files(1).name:files(k).name];

 med=cellfun(@median,E);

end

end

end

Answer 1

[Anand]

Why is E a cell array and why are you using cellfun?

Try using the medfilt2 function instead.

for k = 1 : numel(files)

    rgb = imread(files(k).name);

    gry = rgb2gray(rgb);

    E = medfilt2(gry);
  end

[Karthikeyan]

I don't want to calculate median for a single image. I want to take (1,1),(1,2),(1,3),...(m,n) pixels from a set of images and then calculate the median for the corresponding pixel of set of images. Simply I want to create a background model from the image sequence using median filter.