压敏漆技术中的图像几何畸变校正研究

Study of image geometric distortion correction for PSP measurements

针对压敏漆技术中有风条件下飞机图像的几何畸变问题,给出了一种建立三角网进行校正的方法。该方法以飞机表面的人工标志点与自选的边缘控制点相结合构成三角网控制点,改进了SUSAN算法实现边缘控制点的选取,采用Delau-nay三角剖分建立三角网,最后利用基于Bresenham画线算法的快速算法实现三角形区域的图像重绘。对变形的飞机模型图像进行了畸变校正和结果分析,取得了很好的校正效果,有助于提高压敏漆技术中飞机表面压力测量的准确性。

Aiming at image geometric distortion correction to optical pressure-sensitive-paint pressure measurement,a method of cor-rection based on triangle mesh is presented.It defines the triangle mesh control points made up of artificial signs and marginal signs,proposes a SUSAN based marginal signs extracting method,constructs triangle mesh in Delaunay triangulation and renders the image in a new way based on Bresenham algorithm.Corrected the distorted image and analyzed the result,demonstrated the method has a good performance,increased the accuracy of optical pressure measurement.