Jp2_family_src jp2_family_in = new Jp2_family_src();
int ref_component = 0;
try {
jp2_family_in.Open(r.getImageFile(), true);
inputSource.Open(jp2_family_in, true);
Kdu_codestream codestream = new Kdu_codestream();
codestream.Create(inputSource.Access_codestream(ref_component).Open_stream());
int minLevels = codestream.Get_min_dwt_levels();
int depth = codestream.Get_bit_depth(ref_component);