There is a issue in Step_4_CDR_output.m

[Chaung-Chin-Yi]

Below are error messages after I execute Step_4_CDR_output.m :

'edge' requires one of the following:
Image Processing Toolbox
Statistics and Machine Learning Toolbox

Error in fun_DiscFit (line 5)
edge_disc = edge(tmp_map);

Error in fun_Ell_Fit (line 8)
Ellp.ellp_para = fun_DiscFit( Ellp.raw_map );