19-06-2012, 05:53 PM
Reversible data-embedding scheme using differences between original and predicted pixel values
Reversible data-embedding scheme.pdf (Size: 918.84 KB / Downloads: 46)
Abstract:
Reversible data embedding is a very important issue, especially in dealing with sensitive images such as
military data and medical data. Based on the edge-directed prediction scheme, the authors propose a reversible
data-embedding scheme to embed secret information in original images. In the proposed scheme, an embedded
pixel value is generalised according to a predetermined threshold and the difference between the predicted pixel
value and its original pixel value. Experimental results show that the proposed scheme can provide great payload
capacity while preserving the quality of the stego-image.
Introduction
As a result of rapid advances in computer technology,
digitised media of all kinds, especially digital images, have
become more and more popular because of their numerous
advantages, such as easy editing, lossless copying and fast
distribution [1]. By adopting various Internet techniques, a
sender can easily send digital media to a receiver anywhere
without being restricted by geography. However, the
Internet is an open environment. Everyone can easily
access, modify or copy digital objects transmitted over the
Internet. Thus, receivers have difficulty verifying the
authenticity or integrity of received digital objects.
Related works
In this section, we briefly review some existing reversible
data-embedding schemes in Section 2.1. Then, the EDP
scheme of Li and Orchard [17], which is later applied in
our proposed scheme, is illustrated in Section 2.2.
Reviews of existing reversible dataembedding
techniques
The literature on reversible data embedding is quite limited.
Honsinger et al. [18] was the first to propose the concept, but
their scheme was designed solely for lossless authentication.
In addition, their scheme also suffered from the disturbing
salt-and-pepper noise problem. To solve that problem,
Vleeschouwer et al. [19] used a circular interpretation of
bijective transformations. Nevertheless, the payload capacity
is limited to provide an acceptable visual quality of the
embedded image.
Embedding phase
Our proposed scheme combines Li and Orchard’s scheme
and our proposed strategy for modifying the predicted
values to hide secret information in a host image and
generate a stego-image. Fig. 5 shows the five steps in our
proposed embedding phase.
Conclusions
EDP has provided an effective means for predicting lossless
compression. Our proposed scheme builds on EDP to
design a simple and lossless data-embedding scheme for
grey-level images. The experimental results also confirm
that the hiding capacity of our proposed scheme is greater
than that of either Tian’s or Celik’s scheme .
Reversible data-embedding scheme.pdf (Size: 918.84 KB / Downloads: 46)
Abstract:
Reversible data embedding is a very important issue, especially in dealing with sensitive images such as
military data and medical data. Based on the edge-directed prediction scheme, the authors propose a reversible
data-embedding scheme to embed secret information in original images. In the proposed scheme, an embedded
pixel value is generalised according to a predetermined threshold and the difference between the predicted pixel
value and its original pixel value. Experimental results show that the proposed scheme can provide great payload
capacity while preserving the quality of the stego-image.
Introduction
As a result of rapid advances in computer technology,
digitised media of all kinds, especially digital images, have
become more and more popular because of their numerous
advantages, such as easy editing, lossless copying and fast
distribution [1]. By adopting various Internet techniques, a
sender can easily send digital media to a receiver anywhere
without being restricted by geography. However, the
Internet is an open environment. Everyone can easily
access, modify or copy digital objects transmitted over the
Internet. Thus, receivers have difficulty verifying the
authenticity or integrity of received digital objects.
Related works
In this section, we briefly review some existing reversible
data-embedding schemes in Section 2.1. Then, the EDP
scheme of Li and Orchard [17], which is later applied in
our proposed scheme, is illustrated in Section 2.2.
Reviews of existing reversible dataembedding
techniques
The literature on reversible data embedding is quite limited.
Honsinger et al. [18] was the first to propose the concept, but
their scheme was designed solely for lossless authentication.
In addition, their scheme also suffered from the disturbing
salt-and-pepper noise problem. To solve that problem,
Vleeschouwer et al. [19] used a circular interpretation of
bijective transformations. Nevertheless, the payload capacity
is limited to provide an acceptable visual quality of the
embedded image.
Embedding phase
Our proposed scheme combines Li and Orchard’s scheme
and our proposed strategy for modifying the predicted
values to hide secret information in a host image and
generate a stego-image. Fig. 5 shows the five steps in our
proposed embedding phase.
Conclusions
EDP has provided an effective means for predicting lossless
compression. Our proposed scheme builds on EDP to
design a simple and lossless data-embedding scheme for
grey-level images. The experimental results also confirm
that the hiding capacity of our proposed scheme is greater
than that of either Tian’s or Celik’s scheme .