1. Borchers, H.W., 2022. pracma: Practical Numerical Math Functions. R package version 2.4.4 [WWW Document]. URL https://CRAN.R-project.org/package=pracma (accessed 11.12.2023).
2. A simple “equal area” calibration for fisheye photography;Clark;Agric. For. Meteorol.,1988
3. Díaz, G.M., 2023a. rcaiman: cAnopy IMage ANalysis. R package version 1.2.2 [WWW Document]. URL https://CRAN.R-project.org/package=rcaiman (accessed 11.12.2023).
4. Optimizing forest canopy structure retrieval from smartphone-based hemispherical photography;Dı́az;Methods Ecol. Evol.,2023
5. Model-based local thresholding for canopy hemispherical photography;Dı́az;Can. J. For. Res.,2018