Introduction: Yuri Rzhanov, with a Ph.D. in Physics and Mathematics from the Russian Academy of Sciences, is a Research Professor in the Center for Coastal and Ocean Mapping. He completed his thesis on nonlinear phenomena in solid state semiconductors in 1983. Since joining the center in 2000, he has worked on a number of signal processing problems, including construction of large-scale mosaics from underwater imagery, automatic segmentation of acoustic backscatter mosaics, accurate measurements of underwater objects from stereo imagery. His research interests include development of algorithms and their implementation in software for 3D reconstruction of underwater scenes, automatic detection and abundance estimation of various marine species from imagery acquired from ROVs, AUVs, towed and handheld cameras.