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研究了含冲击波流场干涉图的图像处理方法。首先利用快速条纹细化算法细化干涉条纹,并利用条纹追踪算法提取冲击波波阵面,然后根据配准算法把序列冲击波波阵面配准在同一幅画面上。根据上述算法,在PC-VISION100图像处理机上开发了应用软件。实验结果表明,该方法不但可用于从流场干涉图中提取冲击波波阵面,更重要的是可用于从含冲击波流场干涉图中定量计算冲击波的传播速度和压力分布。
The image processing method with the shock wave field interferogram is studied. Firstly, the fringe fringes are refined by the fast fringe thinning algorithm, and the fringe wave fronts are extracted by using the fringe tracking algorithm. Then, the registration of the shock wave fronts on the same frame is performed according to the registration algorithm. According to the above algorithm, PC-VISION100 image processor has been developed on the application software. The experimental results show that this method can not only be used to extract the shock wave front from the interferogram of the flow field, but also can be used to quantitatively calculate the propagation velocity and pressure distribution of the shock wave from the interferogram of the shock wave field.