Abstract
This study proposed to evaluate the performance of transform domain algorithms in watermarking based on different level of sub bands of discrete wavelet transform (DWT) that can be used to overcome illegal copy, manipulation, distribution and reproduction of image on the network by implementing watermarking algorithm based on different levels that is low-level (LL), low- high (LH), high-low (HL), High-high (HH) and singular value decomposition (SVD) on image for their robustness, and imperceptibility. Moreover, two parameters were applied to evaluate the performance. That is, peak signal to noise ratio (PSNR) is used to measure imperceptibility of the digital image while normalize cross correlation (NCC) is applied to measure the robustness of digital image. The performance evaluations of the proposed method were implemented in MATLAB. The results showed that the described method imperceptible of HL level sub-bands than other levels of sub-bands. While the robustness is achieved by all levels sub-bands.
Highlights
With the new progress in the internet technology, it makes digital contents to be accessible by various users
Theakur, proposed digital watermarking algorithms based on the discrete wavelet transform (DWT), FFT and singular value decomposition (SVD) for imperceptibility and robustness on digital image watermarking
Figure (1) has shown the entire original image used for different levels of sub-band of DWT based on LL, low- high (LH), HL and HH for digital watermarking
Summary
With the new progress in the internet technology, it makes digital contents to be accessible by various users This technology has advantages such as digital content can be access with less time, digitalization has disadvantages like illegal copy, distribution, reproduction and manipulation on digital contents without the knowledge of the owners [14]. These problems can be solved by applying watermark. Maximum of information indicates the amount of information that can be embedded into multimedia contents, capable of hiding watermarks that can be detected for the authentication and copyright protection based on condition of imperceptibility and robustness. Maximum of information is the number of inserted bits into pixel of the digital image
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