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The article is devoted to the study of the decision support system when analyzing the outflow of a gas jet into a supersonic transverse shear flow based on the results of processing photographs (video frames) in terms of the image intensity parameter. Studies of image intensity matrices using contour analysis and receptor models make it possible to determine with great certainty the position of any section (or a conglomerate of sections) of the gas stream with an estimate of its geometry and area with a given range of image intensities. All this makes it possible to determine regions with a given law of variation in the density of the gas flow from a given interval of image intensity, to reveal the contours of the boundaries of a given flow. The study of the law of change in the intensity of the image in given sections makes it possible to reveal the laws of the flow within them. The application of the Freeman chain code, correlation and regression analyzes allows determining with great certainty the geometric parameters of shock waves, in particular, the slope of the curve at any point of the curve. Taking into account multifactor analysis, if sufficient statistical data are available, the correlation relationship between the density, the pressure in the gas stream and the intensity of the image in the photographs is determined. [ABSTRACT FROM AUTHOR]