Affiliations: Department of Information Engineering and Computer
Science Feng Chia University, Taichung 40724, Taiwan, ROC. E-mail: cclin@ocit.edu.tw;
nlhsueh@fcu.edu.tw; shen@ocit.edu.tw
Note: [] Address for correspondence: Department of
Information Management, 100 Chiao Kwang Road, Taichung 40721, Taiwan, ROC
Abstract: In this paper, we propose an embedding algorithm, of high visual
quality, that can adaptively embed a binary message into an image. The binary
message to be embedded is divided into two segments, each of which is then
decomposed into n + 1 or n types of sub-messages (where n ⩾ 3 enables each
pixel to embed a sub-message), respectively, according to the desired embedding
capacity. Embedding is done by leaving the pixel value unchanged or changing it
into one of its n or n − 1 neighboring values according to the type of the
sub-message. From the results of this study, each pixel may not embed a fixed
number of message bits and the adjustment of the pixel value is minimal, thus
the image quality is significantly improved by adaptively decomposing the
message into sub-messages and embedding them into the host image.
