DOI:
10.18413/2518-1092-2017-2-4-59-66
RESEARCH OF ALGORITHMS CONCEALED INTRODUCTION OF DATA IN GRAYSCALE IMAGES SPATIAL DOMAIN
Real images are not a random image with a uniform distribution, so using them as containers in steganography coding is an actual task. Non-formatting encoding methods use image properties. This article proposes to consider the following non-formatting method of steganography: encoding in sub-bands of an image where information is bit-coded in an image, including a limited sub-band of an image container, using a limited number of its coefficients, the choice of which obeys the implemented algorithm. This method is considered in a comparative analysis using the spread spectrum, in which the information message is bit by bit modulated by multiplying by an ensemble of orthogonal signals.
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