基于Radon变换的横向剪切干涉图的自动检测技术

The inspection technology of the displacement of shear on the lateral shearing interferometer based on Radon transform

在分析测试原理的基础上,指出了现有方法的横向剪切量获得的不足,根据剪切图和Radon变换在边缘处具有突变的特点,提出了一种基于Radon变换的横向剪切干涉图的剪切量的自动检测方法,首先根据二维图像的Radon变换结果,得到剪切图的横向移动方向,对图形进行方向校正。然后利用干涉图形的特点对图形在X和Y方向上进行Radon变换,得到剪切量。利用MATLAB进行编程,实验结果表明该方法具有很好的性能和较高的实用价值。

The shortage of existing method, which the shearing displacement was obtained, was pointed out. Based on the characteristic of shearing image and Radon transform with catastrophe point in the edge, the new inspection method of shearing displacement based on Radon transform was put forward. The direction of lateral shift was found form Radon transform. The slope of image was revised. The shearing displacement in direction of X and Y were obtained form the Radon transform by MATLAB. This method was proved with good performance and upper practicality value.