Using slides to test for changes in crown defoliation assessment methods part II: Application of the image analysis system CROCO

被引：0

作者：

Matthias Dobbertin

Christian Hug

Nobuya Mizoue

机构：

[1] Snow and Landscape Research,Swiss Federal Institute for Forest

[2] WSL,Faculty of Agriculture

[3] Kyushu University,undefined

来源：

Environmental Monitoring and Assessment | 2005年 / 102卷

关键词：

CROCO; fractals; tree defoliation; assessment methods; quality of photographs;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We tested whether the semi-automatic program CROCO can replace visual assessments of slides to detect changes in defoliation assessment methods. We randomly selected a series of slides of 24 Norway spruce trees with 220 field assessments made between 1986 and 1995. The slides had been randomly arranged and assessed by three experts without knowledge of the tree number or the year when the slide was taken. Defoliation scores were computed with CROCO. Each tree had thus three different defoliation scores, field assessments, photo assessments and CROCO scores.

引用

页码：167 / 178

页数：11