Підвищення стійкості ЦВЗ до геометричних спотворень у системах безпеки на основі визначення особливих точок зображення

Abstract

In view of the instability of the basic direct methods of computer steganography (NZB, MIC, etc.) to the attacks of the active violator in this section of the thesis, a method is proposed that allows the embedding of the CNS in an image that is resistant to geometric attacks. The transition from time or spatial to frequency domain makes it possible to distinguish areas of graphic containers that carry the most useful information and least distort the processing operations or active attacks of the offender. Violation of the integrity of the container, in particular because of it, scaling, lossy compression, turning, and circumcision are typical of digital watermarking systems.