Development of image measurement technique for large deformed free surface

反射光分布法（RLD法）是一种利用漫射光源的反射光图像进行三维波场测量的方法。该方法的独特之处在于，它允许自由表面映射由单个相机没有播种材料的水面上。在这项研究中，我们开发了两种技术来扩展动态范围的RLD方法。第一种是迭代计算的波高重建技术。二是大变形反射光图像的跟踪新方法。

Reflected Light Distribution method (RLD method) is a method for 3-D wave field measurements by using reflected light image from diffused light source. The unique feature of this method is that it allows free surface mapping by single camera without seeding materials on the water surface. In this study, we developed two techniques for extending dynamic range of the RLD method. The first is wave height reconstruction technique by using iterative calculation. The second is new tracking method for large deformed reflected light images.