Program sfnlm2 | 2D non-local median filtering. 
[SYNOPSIS]
sfnlm2 < in.rsf > out.rsf t1=5 t2=5 f1=2 f2=2 h=0.5 boundary=n
[PARAMETERS]
bool    | boundary | =n |  [y/n] | 	if y, boundary is data, whereas zero
int     | f1 | =2 |   | 	radio of similarity window 
int     | f2 | =2 |   | 	radio of similarity window 
float   | h | =0.5 |   | 	degree of filtering 
int     | t1 | =5 |   | 	radio of search window 
int     | t2 | =5 |   | 	radio of search window 
[DIRECTORY]
user/chenyk
