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,准确实验图象的获取一直是一个难题。本文以水洞模型超空化实验中的超空泡外形测量为例,基于计算机图形学提出了一种水洞实验图象的处理方法,该方法可以对水洞实验中所拍摄的图象边界进行检测与定量标注;基于光学原理,借助实验模型与其图象,获得了实验空泡边界坐标的修正函数。该图象处理与修正方法,不仅可以消除摄取图象因不同介质引起的折射误差,而且可以获得图形的定量结果。经多次应用表明,具有较高的精度,取得了很好的应用效果。
A method of disposing images, which are gained in water tunnel experiment, is presented based on the ideas of pels in this paper. This method can inspect edges of images and get quantificational dimensions of images. Based on optical principles and test model, a correcting function is developed in this paper that corrects edge coordinates of experimental images. This method not only removes the refractive error induced by different medium, but also gets the quantificational results of images. Through substantive applications, it s showed the precision of this method is better.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2004年第5期682-686,共5页
Chinese Journal of Hydrodynamics
基金
国防预研基金
国防重点实验室基金资助
关键词
水洞实验
空泡形状
图像处理
MATLAB
修正函数
water tunnel experiment
cavity shape
image manipulation
Matlab
correcting function
