function bitcol = findRidgesCol2(col)

len = length(col);
bitcol = zeros(len,1);

for k=2:len
    diff(k-1) = col(k) - col(k-1);
end

waspos = 0;

if diff(1) > 0
    waspos = 1;
end

for k=2:len-1  
    if diff(k) < 0 && waspos == 1
        waspos = 0;
        bitcol(k) = 1;
    elseif diff(k) > 0
        waspos = 1;
    end
end