| 摘要 |
FIELD: cryptography technique; hidden storage and transfer of confidential information through open communication channels; marking of images containing large amounts of additional information. ^ SUBSTANCE: method for embedding additional information into digital images consists in substitution of separate bits in bytes of initial image. The remaining part of bits is used for correction of final digital image. The initial digital image is separated into bit layers. One of the obtained bit layers which is represented by bit sequence is chosen for writing additional information. Writing of additional information into obtained bit sequence is made using code. During writing of additional information using code bits in the obtained bit sequence, that are located on the margins of all changes of same bit sequences of zeroes and ones, are replaced in accordance to bits of written additional information. ^ EFFECT: increased volume of embedded information and ensured high tolerance of messages against some steganoanalysis methods. ^ 2 dwg, 4 tbl |
