A comparison of video and point intercept transect methods for monitoring subtropical coral communities

By K. Lam, P. Shin, R. Bradbeer, D. Randall, K. Ku, P. Hodgson, S. Cheung. 2006

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Underwater video techniques for observing coastal marine biodiversity: A review of sixty years of publications (1952–2012) (2014, methodology): “A reference bar 248 attached to the camera housing is sometimes used to control the camera elevation (Leonard 249 13 and Clark, 1993; Vogt et al., 1997; Rogers and Miller, 2001; Lam et al., 2006; Cruz et al., 250 2008).”
A "quick and clean" photographic method for the description of coral reef habitats (2009, methodology): “Yet, video recordings exhibit much lower resolution/image quality compared to still photography that may not allow easy habitat description unless the diver stays close to the substrate, even for the most recent underwater high-definition cameras (Lam et al., 2006).”
photoQuad: A dedicated seabed image processing software, and a comparative error analysis of four photoquadrat methods (2012, background): “With the advances of digital photography and the introduction of high resolution cameras, still images of quadrats (hereafter referred to as photoquadrats) further reduce the time spent on the field, increase the number of samples per survey, facilitate sampling over large spatial and temporal scale”