@article{MAKHILLJEAS2018131116295,
    title = {Using Discrete Wavelet Transformation Algorithm for
Authentication Digital Image Watermark},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {13},
    number = {11},
    pages = {4001-4008},
    year = {2018},
    issn = {1816-949x},
    doi = {jeasci.2018.4001.4008},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2018.4001.4008},
    author = {Zahraa},
    keywords = {cropping,DWT-DCT,DWT,PSNR,rotation,attacks},
    abstract = {Watermarking is one of the methods to hide secret information in multimedia contents. The main
concept of watermarking is a pattern of bits placed into an image. Watermarking is also a type of steganography
field in which some of the useful information can be hidden inside another innocent image. In this study, the
watermarking is utilized for solving the authentication issue. In addition to utilizing Discrete Wavelet Transform
(DWT) algorithm to develop image security by hiding the watermark image inside the original image to prove
owner image. DWT can combine more than one image by using mathematical techniques and used to embed
and extract the watermark image and low bit-rate transmission. Different type of attacks can be used in order
to steal the ownership or destroy it such as rotation, dithering and cropping attack. This study expected to
conclude a technique that is able to hide the secret information (message) inside the image by utilizing DWT
to avoid all the different types of attacks and finally extract the secret data from the image. Two techniques have
been used to achieve imperceptibility and robustness of the watermark against certain geometric and
non-geometric attacks. DWT is the solo technique showed good imperceptibility with 80.128 value of PSNR
while DWT-DCT showed greater improvement with 96.73 of the PSNR value. The proposed technique gave
impressing performance against different attacks such as Gaussian noise, dithering and cropping. On the other
hand, DWT-DCT experiences difficulties against compression and rotation techniques due to the nature of the
attacks.}
    }