function [skin_rgb, all_rgb] = generateSkinData(input)

    if( isstruct(input) == 0 )
        count = 1;
        img = input;
    else
        count = length(input);
    end
        
    for i = 1:count,
        if( isstruct(input) )
            img = input(i).cdata;
        end
        
        image(img);
        idx = find(roipoly>0);
        R = double(img(:,:,1));
        G = double(img(:,:,2));
        B = double(img(:,:,3));
    
        if(i == 1),
            all_rgb = [R(:), G(:), B(:)];
            skin_rgb = [R(idx), G(idx), B(idx)];
        else
            all_rgb = [all_rgb; R(:), G(:), B(:)];
            skin_rgb = [skin_rgb; R(idx), G(idx), B(idx)];
        end
    end