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Estimation of the canopy‐gap size using two photographs taken at different heights
Author(s) -
Yamamoto Kazukiyo
Publication year - 2000
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1046/j.1440-1703.2000.00341.x
Subject(s) - canopy , cryptomeria , digital camera , environmental science , japonica , remote sensing , mathematics , geography , ecology , optics , botany , physics , biology
A new, convenient method to estimate canopy‐gap size using a camera is proposed. Canopy‐gap size was estimated from two images taken with a vertically mounted, digital camera at high and low points (P h and P l ) beneath a canopy gap. The actual ( A OBS ) and estimated ( A Δ1.0 ) canopy‐gap sizes were highly correlated ( R 2 > 0.93) for 16 canopy gaps in the Cryptomeria japonica D. Don. plantations, and the relationship between A Δ1.0 and A OBS was expressed as A Δ1.0 = 1.16 A OBS . Thus, the method overestimated actual canopy‐gap size by an average of 16%.