ALGORITHM OF DYNAMIC COORDINATE-VARIABLE EMBEDDING AND AUTOMATIC DETECTION OF INVISIBLE ROBUST DIGITAL WATERMARKS IN THE FREQUENCY DOMAIN OF THE VIDEO STREAM

Abstract

Одним из способов внедрения цифровых водяных знаков является преобразование в частотной области изображения. В статье предлагается алгоритм динамического внедрения цифровых водяных знаков в видеоданные. Global scientific and technological progress contributes to the continuous growth of multimedia content in the global network. In some cases, when creating and distributing unique video information, the task of copyright protection arises, as well as the task of unambiguous identification of the content source. Therefore, the preservation of protected, stable and visually imperceptible signs with information about the sources of reproduction in the structure of the video stream is an urgent task. A common method of protecting multimedia information from unauthorized distribution is the introduction of digital watermarks in the video sequence. One of the ways to introduce digital watermarks is to transform in the frequency domain of the image. At the same time, any changes in the frequency spectrum will certainly lead to image distortion and the appearance of artifacts. Therefore, the method of implementing a hidden message should provide as little visual distortion of video data as possible. At the same time, the hidden message must be robust enough to remain retrievable after various impacts and operations with video data. The article proposes an algorithm for the dynamic implementation of digital watermarks in video data, which consists in changing the coordinates of the marker insertion according to the law of pseudorandom sequence.