METHOD OF SEPARATION OF DIGITAL IMAGES IN DIFFERENT ORIGINAL STORAGE FORMATS BASED ON THE PROPERTIES OF THE MATRIX OF SMALLEST SINGULAR VALUES OF BLOCKS

Abstract

Today digital images are one of the main carriers of information, and the integrity of the image is a necessary condition for the possibility of its use for non-entertainment purposes in any field of human activity. Changing the format of an entire image or changing the format of a part of it is often the result of making unauthorized changes to the image, making the detection of the fact of re-saving to a format different from the original one an indicator of a violation of the integrity of the image. Thus, the task of separating images in different (with/without loss) formats, increasing the efficiency of which by developing a suitable method is the aim of this work, and urgent task of modern information security. The proposed method is based on the analysis of the properties of the matrix of the smallest singular values of blocks, which corresponds to the image. The algorithmic implementation of the method made it possible to increase the efficiency of separation of images in various original storage formats in comparison with analogues, as a result of which there is an overall increase in the efficiency of detecting violations of the integrity of the image, in particular during steganalysis, detection of photomontage, etc.