TY - JOUR T1 - Spatial Statistics of Objects in 3-D Sonar Images: Application to Fisheries Acoustics A1 - Lefort,Riwal A1 - Fablet,Ronan A1 - Berger,Laurent A1 - Boucher,Jm AD - IFREMER, F-29280 Plouzane, France. AD - Telecom Bretagne, F-29280 Plouzane, France. AD - UR - https://doi.org/10.1109/LGRS.2011.2160328 DO - 10.1109/LGRS.2011.2160328 KW - Fisheries acoustics KW - multibeam sensor KW - object patterns in images KW - point processes KW - spatial statistics N2 - In this letter, we address the characterization of objects in 3-D sonar images of the water column obtained by a multibeam echo sounder. Compared with classic 2-D images from a monobeam echo sounder, these 3-D images provide finer scale observation of the pelagic biomasses and new tools to characterize 3-D distributions. By viewing object patterns as realizations of spatial point processes, we investigate descriptive spatial statistics. This method is then applied to 3-D fisheries acoustics data set for characterization of the distribution of pelagic fish schools. Reported experiments illustrate the relevance of the proposed descriptors. The comparison of our method with 2-D sonar data analysis further demonstrates the information gain from using 3-D sonar imagery. Y1 - 2012/01 PB - Ieee-inst Electrical Electronics Engineers Inc JF - Ieee Geoscience And Remote Sensing Letters SN - 1545-598X VL - 9 IS - 1 SP - 56 EP - 59 ID - 16769 ER -