Measurement of wave surface using stereo stereophotogrammetry

利用立体摄影测量法测量波面

• 批准号: 20760329
• 负责人: ARITA Mamoru
• 金额: $ 2.66万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760329/
• 关键词: 波面計測; 画像; ステレオ画像法; 画像解析; 波浪計測

Over the past decade, a considerable number of studies have been conducted on the wave plane distributions by using two video camera images. These studies analyzed azimuth difference of digital images taken by video cameras. The problem of these studies is to find the same element between two images. Generally, they put the targets or tracers in images to solve azimuth difference. This way which comes from Particle Image Velocimetry (PIV) method, is sufficiency to measure waves. However, this method involves difficulties to put the appropriate number of targets or tracers on water surface evenly, which is not reasonable to measure sea waves. We had measured wave profile using experimental water tank without tracers or targets. We generated a few kinds of regular waves and took the pictures by two digital cameras and analyzed the azimuth difference in digital images by stereo matching method.

在过去的十年中，已经进行了相当多的研究，通过使用两个摄像机图像的波平面分布。这些研究分析了摄像机拍摄的数字图像的方位差。这些研究的问题是找到两个图像之间的相同元素。一般都是将目标或示踪剂放入图像中来解算方位差。该方法来源于粒子图像测速（PIV）方法，适用于波浪测量.但是，这种方法在测量海浪时，很难在水面上均匀地放置适当数量的目标或示踪物，这对测量海浪是不合理的。我们在没有示踪物或靶的情况下，用实验水池测量了波浪剖面。利用两台数码相机拍摄了几种规则波，并利用立体匹配的方法对数字图像中的方位差进行了分析。