Background estimation

7 novembro 2019, 14:00 • João Paulo Salgado Arriscado Costeira

Given a sequence taken from a static camera, how to compute the background image using the median (explained in class). Check with twocams_books dataset.

 

imgmed=zeros(480,640,45);

for i=1:45,

    load(['depth1_' int2str(i) '.mat']);

    imagesc(depth_array);

    imgmed(:,:,i)=double(depth_array)/1000;

    pause(.1)

    drawnow;

end

bg=median(imgmed,3);

d=dir('depth1*.mat');

for i=1:length(d),

    load(d(i).name);

    imagesc(abs(double(depth_array)/1000-bg)>.25);

    colormap(gray);

    pause(1);

end