航片无影点测高原理的理论证明及应用

• 作 者: 彭品勋 童建明 刘孟辉
• 机 构: 中南林学院,中南林学院,中南林学院
• 出 处: 林业资源管理
• 发表日期: 1988年02期
• 关键词: 影点 测高 航空像片 林业生产 特征点 航片 量测 特性测量 实地测量 像片

量测树木的高度是林业生产与科研中的一项十分重要的工作,其方法较多,也有不少测高仪器,但大都依赖于实地测量,费时费事。无影点是航空像片的一个鲜为人知的特征点,无论是理论上还是实践中很少有人涉足。本文从几何的角度进行了严密的理论证明,并对它在测量树木(或地物)的高度上进行了探讨和推导。经过大量的实验证明利用无影点的特性测量树木的高度是一种好方法。

Measuring the height of trees is a very important work in forestry production and scientific research. There are many methods and many altimeters. However, most of them rely on field measurements and take time and trouble. Shadowless points are a lesser-known feature point of aerial photography, and few are involved in theory or in practice. This article has carried on the rigorous theoretic proof from the geometrical angle, and has carried on the discussion and derivation to it in measuring the height of the tree (or the ground object). After a large number of experiments show that the use of shadowless characteristics of the height of trees is a good way to measure.