Til Aach Cicero Mota Ingo Stuke Matthias Mühlich Erhardt Barth Analysis of Superimposed Oriented Patterns. 3690-3700 2006 15 IEEE Transactions on Image Processing 12 http://dx.doi.org/10.1109/TIP.2006.884921 db/journals/tip/tip15.html#AachMSMB06