Didi Rosiyadi

Learn More
This paper proposes an adaptive watermarking scheme for e-government document images. The adaptive scheme combines the discrete cosine transform (DCT) and the singular value decomposition (SVD) using luminance masking. As a core of masking model in the human visual system (HVS), luminance masking is implemented to improve noise sensitivity. Genetic(More)
1047-3203/$ see front matter 2013 Elsevier Inc. All rights reserved. http://dx.doi.org/10.1016/j.jvcir.2013.07.008 q This work was supported in part by the National Science Council under contract number NSC-99-2916-I-011-002-A1, and it was also partially supported by the 111 Project under the Grant No. 111-2-14 and One Hundred Person Project 2012, Sichuan(More)
This paper presents a watermarking scheme based on DCT using HVS characteristic. The proposed watermarking scheme hides watermark into an image, and takes HVS characteristic into consideration during the watermark embedding process. The image is first divided into blocks. Blocks containing significant DC coefficients, which represent the bright area of the(More)
This study presents a resistant digital image watermarking scheme based on masking model. The Singular Value Decomposition (SVD) method has been used on this scheme based on luminance masking with non-blind watermarking model in which an original image was needed in an extraction process. The resistance of digital images was checked against some of(More)
With the aid of Internet technology, multimedia information can be shared with ease over the public networks. This circumstance, however, creates problems of data security. Thus, watermarking or data hiding has become crucial to protect the Intellectual property rights. This paper proposed watermarking scheme for copyright protection based on DCT domain(More)
This paper proposed the reversible image watermarking based on histogram modification and virtual border to protect the digital image originality. The color histogram was used to embed the digital signature of image. The histogram was modified based on the payload, thus the changes can be minimized. The reversibility was obtained from the storing of changes(More)
  • 1