The schlieren interferograms used to be analyzed in a qualitative way. In this paper, by meansof the powerful computational ability and the large memory of computer; the image processing method isinvestigated for the ...The schlieren interferograms used to be analyzed in a qualitative way. In this paper, by meansof the powerful computational ability and the large memory of computer; the image processing method isinvestigated for the digitalization of an axisymmetric schlieren interferogram and the determination of thedensity field. This method includes the 2-D low-pass filtering, the thinning of interferometric fringes, theextraction of physical information and the numerical integration of the density field. The image processingresults show that the accuracy of the quantitative analysis of the schlieren interferogram can be improved anda lot of time can be saved in dealing with optical experimental results. Therefore, the algorithm used here isuseful and efficient.展开更多
文摘The schlieren interferograms used to be analyzed in a qualitative way. In this paper, by meansof the powerful computational ability and the large memory of computer; the image processing method isinvestigated for the digitalization of an axisymmetric schlieren interferogram and the determination of thedensity field. This method includes the 2-D low-pass filtering, the thinning of interferometric fringes, theextraction of physical information and the numerical integration of the density field. The image processingresults show that the accuracy of the quantitative analysis of the schlieren interferogram can be improved anda lot of time can be saved in dealing with optical experimental results. Therefore, the algorithm used here isuseful and efficient.
