離多遠？飛多快？數位照片之動態性測量原理

Principle of Dynamic Measurement Applied on Digital Photographs

黃芳國(Fan-Kuo Huang) ； 鍾金男(Ching-Nan Chung)

《台灣猛禽研究》 10期 (2010/10) Pp. 1-16

https://doi.org/10.30121/RRT.201010.0001

摘要

看到幾張飛鳥或飛機的照片，可以從照片中知道他們離我們多遠？飛多快嗎？照片中的影像大小與飛行物的距離有關，且受飛行角度的影響。我們將研究平面影像與飛行體實物之間的關係，以相機拍攝的數位照片估測飛行體的距離、飛行速度及二飛行體之間的距離，且在動態性的測量之後探討數位照片在靜態測量上的應用。最後，筆者將計算過程簡化為EXCEL試算表工具，以方便有興趣的讀者運用。

關鍵字

數位照片 ； 測量 ； 飛鳥 ； 距離 ； 速度

並列摘要

Given a few photographs, can we figure out the distance and traveling speed of a flying object, such as a bird or an airplane, from the photographer? From the relative image sizes of such flying object and its flying angles, we can extract critical information and then measure these dynamic values. In this article, we will learn how to measure the distance and speed of a flying object using two-dimensional photo images. we will also examine the relationship between 2-D digital images and dynamic measurement values. After thoroughly understanding the dynamic measurement principles, at the end, we will discuss the applications using static measurement of digital photos. The author also included an Excel-based calculation tool to facilitate readers' own research.

並列關鍵字

digital photograph ； Measurement ； flying bird ； distance ； speed