image_watermarking
所属分类:matlab编程
开发工具:matlab
文件大小:100KB
下载次数:8
上传日期:2011-01-08 13:08:29
上 传 者:
binaryvirus
说明: Digital Water Marking of images
文件列表:
image watermarking (0, 2011-01-08)
image watermarking\prova.m (6290, 2005-08-07)
image watermarking\Thumbs.db (5632, 2011-01-08)
image watermarking\v17.jpg (84956, 2002-07-10)
image watermarking\wm_casting.p (9521, 2005-08-06)
image watermarking\wm_detection.p (6451, 2005-08-06)
Copy all files in Matlab current directory and type "prova" (the main file) on Matlab
command window. You can change simulation parameters present in this main file.
See the cited article (see below) for more details.
image watermarking
Digital watermarking has been proposed as a viable solution
to the need of copyright protection and authentication
of multimedia data in a networked environment, since
it makes possible to identify the author, owner, distributor
or authorized consumer of a document. In this paper a new
watermarking technique to add a code to digital images is
presented: the method operates in the frequency domain
embedding a pseudo-random sequence of real numbers in a
selected set of DCT coeficients. Watermark casting is performed
by exploiting the masking characteristics of the Human
Visual System, to ensure watermark invisibilily. The
embedded sequence is extracted without resorting to the
original image, so that the proposed technique represents
a major improvement to methods relying on the comparison
between the watermarked and original images. Experimental
results demonstrate that the watermark is robust to
most of the signal processing techniques and geometric distortions.
近期下载者:
相关文件:
收藏者: