摘要
在水洞实验中,由于光线在空气、水和观察窗面板中发生折射,准确实验图像的获取一直是一个难题。本文在大量水洞实验图象测量经验积累的基础上,以水洞模型超空化实验中的超空泡外形测量为例,提出了一种基于计算机图形学的水洞实验图像测量与处理的三步法。该方法不仅可对水洞实验中所拍摄的图像进行修正,消除因不同介质引起的折射误差,而且把图像数据化,可利用计算机对图形自动进行定量处理。经多次应用表明,图像测量与处理的三步法应用方便,具有较高的精度,取得了很好的应用效果。
A method of measuring cavity's shapes at axially symmetrical bodies is presented based on the ideas of pixels in this paper. This method is developed through a mass of experiments. Image manipulation, which is provided by MatLab, is conducted in order to get the accurate sizes of cavity. This method not only removes the refractive error induced by different medium, but also gets the quantificational results of images. Through substantive application, it's shown that the precision of this method is better.
出处
《流体力学实验与测量》
EI
CSCD
北大核心
2004年第1期67-70,共4页
Experiments and Measurements in Fluid Mechanics
基金
国防预研基金和国防重点实验室基金资助(J1300C004)
关键词
水洞实验
图像处理
边缘检测
空泡
计算机技术
water tunnel experiment
image
cavity
measure
manipulation
edge inspection
