We studied the effective using of different methods of optical information processing: we obtained results on direct and swirling jets with high-temperature chemical reactions. To create direct flow flames we used: classical ejection burner with circular mixing channels. To create swirling jets in the same channel we placed special axial swirlers with plane blades. We considered commonly used methods and a new approach, namely application of wavelet analysis. Using different methods we discovered differences in the structure of mentioned streams and peculiarities of gas flame thermal mechanics. We conclude that there is no any preferential method of computer identification of turbulent structures: each approved method gave new and original information on the structure formation in the flame.