Shunquan Tan Jiwu Huang Yun Q. Shi Steganalysis of Enhanced BPCS Steganography Using the Hilbert-Huang Transform Based Sequential Analysis. 112-126 2007 IWDW http://dx.doi.org/10.1007/978-3-540-92238-4_10 conf/iwdw/2007 db/conf/iwdw/iwdw2007.html#TanHS07