Repository logo

Browsing by Subject "steganography"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Steganograficzne wykorzystanie piramid filtrów kierunkowych
    (Wydawnictwa AGH, 2008) Kopniak, Piotr
    Steganography is a branch of knowledge which deals with confidential information security by hiding the secret information inside the public one. A digital recording which assures high quality, better data destruction prevention then an analog recording and an easy computer processing is today a main way of a multimedia data saving. This type of data is utilised by computer steganography because of their high redundancy. The redundant data may be substituted by the secret information. This article contains a description of the new steganography algorithm prepared for the author's PhD dissertation based on an innovative use of multiresolution image decomposition by directional filters pyramids (steerable pyramid transform). The steerable pyramids have some advantages comparing to e.g. wavelet transform i.e. more directional subbands at each scale level which gives more information hiding opportunities. The article describes the data embedding algorithm based on Lee and Chen statistical method in detail and the results of the research made for the specification of the algorithm parameters and its steganographical accuracy.