Estimation of the canopy-gap size using two photographs taken at different heights

被引：35

作者：

Yamamoto, K ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi 4648601, Japan

来源：

ECOLOGICAL RESEARCH | 2000年 / 15卷 / 02期

关键词：

canopy-gap size; digital camera; image processing;

D O I：

10.1046/j.1440-1703.2000.00341.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

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(Delta 1.0)) 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(Delta 1.0) and A(OBS) was expressed as A(Delta 1.0) = 1.16A(OBS). Thus, the method overestimated actual canopy-gap size by an average of 16%.

引用

页码：203 / 208

页数：6