Isodensitometry of selected interacting galaxies. I The results are given of digital filtering of large-scale photographs ofinteracting galaxies obtained at the prime focus of the 6-m telescope ofthe Special Astrophysical Observatory. The algorithms used for analysisreduced the strength of the high-frequency noise of the emulsion andraised the angular resolution of the photographs. The results of theprocessing of the objects are presented in the form of two-dimensionalisodensitometric charts, which contain quantitative information aboutthe brightness distribution in the objects. Analysis of the enhancedphotographs of the interacting galaxies makes it possible to make moreprecise the classification of them made earlier byVorontsov-Vel'iaminov.