In order to increase the hiding capacity and provide visually imperceptible changes of an image, a multi-way pixelvalue differencing scheme is proposed in this paper. A threshold value is designated to distinguish between edge-like and smooth blocks. The smooth blocks adopt the original tri-way pixel-value differencing (TPVD) method whereas the edgelike blocks apply the proposed mode selection algorithm to further determine the data embedding way by utilizing horizontal or vertical edges. In addition, a further altering process is conducted to achieve the original partitioning results after the embedding procedure so that the stego-images can extract secret data without the participation of the original cover images. The experimental results show that the proposed method can embed a large hiding capacity in a cover image and the image quality remains high.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.