Reconstruction of Two-Dimensional Tree and Forest Canopy Profiles Using Photographs

Abstract

(1) A point-quadrat method and computed tomography were used to reconstruct two-dimensional foliage density distributions in tree and forest canopies using many photographs taken from various positions in a canopy section. (2) The reconstructed canopy profile (the graphical representation of the foliage density distribution in a canopy section) obtained by computed tomography was similar to the pattern of leaf area density distribution obtained by the clipping method. The calculated foliage density was in direct proportion to the actual leaf area density. (3) Canopy profiles could be reconstructed with photographs taken from the ground level alone. (4) The method was applied to a warm-temperate, evergreen, broad-leaved forest, and a two-dimensional forest canopy structure was obtained quantitatively and nondestructively.