0001 0002 function pCSF=low_pass(N,fc) 0003 0004 fx = linspace(0,32,N); 0005 fy = linspace(0,32,N); 0006 0007 Fx = repmat(fx,N,1); 0008 Fy = repmat(fy',1,N); 0009 0010 F=sqrt(Fx.^2+Fy.^2); 0011 0012 f=zigzag(F); 0013 0014 pCSF=double(250*(f<=fc))+double(1*(f>fc)); 0015