V.K. Zlobin, B.V. Kostrov, V.A. Sablina

The article presents the main achievements of the school of Digital Image Processing which exists in the department of Electronic Computers. In last years in the research carried out by the department a number of theoretical and practical results on the application of sequency methods second analysis of aerospace image (ASI) processing was obtained. The development of scientific research led to the branching of this area into three interrelated components belonging to different classes of tasks ASI processing: noise filtering of the ASI (two-dimensional and quasi-two-dimensional); correlation-extreme ASI matching; descriptor extraction for area recognition of ASI. The methodology of the two-dimensional sequency filtering based on the concept of convolution calculation indirectly in sequency space. Development of sequency methods filter is determined by their application for quasi-two-dimentional sequency spectrum. Application of sequency analysis allows constructing relatively simple and efficient algorithms for matching images. Several variants of such algorithms were proposed. Results of investigations on how to recognize areas for ASI show that the use of sequency methods simplifies the solution of the selection of ASI texture features and install the foundation for further development of scientific direction opening the prospect of practical use in the sequency descriptor construction for automatic area recognition for ASI.