[1] Baum L E , Eagon J A.An inequality with applications to statistical estimation for probabilistic functions of Markov processes and to a model for ecology[J].Bulletin of American Mathematical Statistics, 1967,37: 360-363.
[2] Rabiner L R. A tutorial on hidden Markov models and selected applications in speech recognition[J].Proceedings of the IEEE,1989,77(2):257-286.
[3] Crouse M S,Nowak R D,Baraniuk R C. Wavelet-based statistical signal processing using hidden Markov models[J].IEEE Trans Signal Processing, 1998,46(4) :886-902.
[4] Romberg J K,Hyeokho Choi,Baraniuk R G.Bayesian tree structured image modeling using wavelet-domain hidden Markov models[J].IEEE Trans Image Processing, 2001,10(7):1056-1067.
[5] Donoho D,Johnstone I.Adapting to unknown smoothness via wavelet shrinkage[J]. Ameri Stat Assoc,1995,90(12):1200-1224.
[6] Fan G,Xia X-G.Wavelet-based statistical image processing using Hidden Markov Tree model[A].In:Proceedings 34th Annual Conference on Information Sciences and Systems[C].New Jersey:Princeton, 2000.