Vortex structure recognition based on wavelet and co-occurrence matrix

A new method is proposed to recognize the vortex structure to investigate the optical propagation through high speed flow. Wavelet transform is applied to the refractive index of flow field, and wavelet module matrix is obtained. Applying its co-occurrence matrix and statistical parameters, the recognition is accomplished. Compared with direct recognition after wavelet decomposition, this method can express more characteristics of turbulence vortex structure in space-frequency domain. Simulation results demonstrate the validity of this method. And this method provides bases for precise optical propagation modeling.