A Robust Hybrid Watermarking Technique for Securing Medical Image

Abstract

In the aim to contribute to the security of medical image, we present a robust watermarking method which combines discrete wavelet transform (DWT), discrete cosine transform (DCT) and singular value decomposition (SVD). This approach is intended to insert an invisible image watermark in a medical image. The cover medical image is divided up into the third level of DWT coefficients and then is transformed by DCT and SVD. The same procedure is applied to the watermark image. The singular value of watermark is inserted into the singular value of the high-frequency sub bands of the third level DWT of the cover image. However, the insertion of the watermark in these areas makes it possible to reinforce the robustness of the system of watermarking without hindering the quality of the watermarked image. The performance of the proposed method was evaluated in term of invisibility by calculating the Peak Signal to Noise Ratio (PSNR) between the original and the watermarked image and in term of robustness by measuring the normalized correlation coefficient (NC) between the original watermark and the extracted watermark after applying attacks. The experimental results approve that our proposed hybrid algorithm gives an excellent compromise imperceptibility and robustness against several attacks such as Gaussian noise, Saltand-Pepper, Speckle noise, Average filter, Median filter, and Wiener filter compared with existing methods.

Robust Video Watermarking using Tchebichef Transform and Singular Value Decomposition on the Selected Frame Based YCbCr Color Space

“…Watermarking is a data hiding technique. This method requires cover media which is generally in the form of video, image, or audio [1,2]. Whereas logos or messages that are embedded as copyright on media covers generally can be in the form of images or text, but in watermarking, copyright in the form of images is preferred because it is more resistant to attack, while copyright in the form of a text can change meaning significantly when there is a change in bit value due to attacks.…”

“…One of the requirements for image watermarking is that the copyright size must be smaller than the media cover. Also, the watermark results in musthave aspects such as imperceptibility, robustness, and security [1][2][3][4]. Watermarking is quite similar to the steganography method because these two methods are both branches of data hiding science.…”

A Robust Medical Images Watermarking Using FDCuT-DCT-SVD

“…However, there are still other attacks that greatly change the medical image after the watermark is inserted, such as cropping, flipping, rotate, attacks in this study are still limited. I. Assini et al [11] employed the DWT-DCT-SVD hybrid watermarking technique to ensure copyright rights and medical image security. DWT provides better identification based on the characteristics of the Human Visual System (HVS).…”

An Image Watermarking Method Using Discrete Tchebichef Transform and Singular Value Decomposition Based on Chaos Embedding

“…In general, Arnold transform is mostly done on two-dimensional matrices that are defined as in Eq. (12).…”

“…But the trade-off between robustness and imperceptibility is always the opposite. Domain transformation methods such as DCT, DWT, and SVD are widely applied and proven to work well on image watermarking [4,[6][7][8][9][10][11][12], but each method still has advantages and disadvantages. The DCT method is a standard transformation used in JPEG compression, so by using this method, the results will generally be robust to compression attacks.…”