Definition: <m>sum{}{}{f®}</m>
f(x) is analytical convolution for a segment with Cauchy kernel [McCormack and Sherstyuk 1998]
r - distance to a skeleton point

Call: hfConvLine(x,begin,end,S,T);

Parameters:

x - point coordinates

begin - starting points coordinate array for line segments

end - ending points coordinate array for line segments

S - array of kernel width control parameters for each line segment

T - threshold

Test file: convline.hf