function img=getCubeImage(i, maskOut, homeDir)
    
    if (nargin<3)
        homeDir='Cube/PNG/';
        if (nargin<2)
            maskOut=1;
        end
    end
    
    img=imread([homeDir, num2str(i), '.png']);
    
    blackLevel=2048;
    saturationLevel=max(img(:))-2;
    
    img=img-blackLevel;
    img(img<0)=0;
    
    m=zeros(size(img, 1), size(img, 2));
    for ch=1:3
        m=m+double(img(:, :, ch)>=saturationLevel-blackLevel);
    end
    m=m>0;
    if (maskOut~=0)
        m(1050:end, 2050:end)=1;
    end

    for ch=1:3
        channel=img(:, :, ch);
        channel(m)=0;
        img(:, :, ch)=channel;
    end
        
end