Estimating forest leaf area using cover and fullframe fisheye photography: Thinking inside the circle

By Craig Macfarlane, A. Grigg, C. Evangelista. 2007

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Quantifying the impact of woody material on leaf area index estimation from hemispherical photography using 3D canopy simulations (2016, methodology): “Although the two 326 methods are sampling the same virtual scenes, discrepancies are likely caused by the nature of 327 incomplete HP sampling, well documented in previous studies, e.g. (Macfarlane et al., 2007a).”
Estimating seasonal variations of leaf area index using litterfall collection and optical methods in four mixed evergreen–deciduous forests (2015, methodology): “The digital hemispherical photography (DHP) and the LAI-2000 plant canopy analyzer are two of the most commonly used devices (Chen et al., 2006; Macfarlane et al., 2007b; Chianucci and Cutini, 2013).”
Digital canopy photography: Exposed and in the raw (2014, methodology): “To satisfy this ssumption the gamma value of in-camera JPG images has been ack-corrected in previous studies (e.g. Macfarlane et al., 2007b); owever, our comparison of gamma-adjusted raw data and inamera JPG images suggests that in-camera processing results in ore substantial alteration of digital…”