author = { van Valkenburg-van Haarst, Tanja Y. C. AND Bolderheij, Fok AND Groen, Frans C. A. },

title = { Automatic detection in a maritime environment: gradient filter versus intensity background estimation },

publisher = {SPIE},

isbn = {0277-786X},

year = {2008},

url = { http://slubdd.de/katalog?TN_libero_mab2 }