Medical Image Watermarking Technique Using Image Interpolation in Transform Domain

Abstract

In telemedicine, medical data are shared across the world among different specialists for various purposes through an unsecured medium. So there is a need to protect the medical data during transmission. With the help of image watermarking techniques, medical images are protected along with the electronic patient information (EPI). This paper proposes a medical image watermarking, by applying wavelet transform, using an interpolation technique. EPI data is embedded within the transformed medical image to generate a watermarked image. At the extraction side, EPI data are extracted and medical image is reconstructed without any loss. The performance of the proposed method is analyzed using a peak signal to noise ratio (PSNR), mean absolute error (MAE) and structural similarity index (SSIM). The experimental result shows that the proposed method gives better results.

An Enhanced Approach of Image Steganographic Using Discrete Shearlet Transform and Secret Sharing

“…There are a several methods of data hiding have been proposed by researchers. Some of these methods are applied at spatial domain of images 5,11,15 and others are used in transform domain of images 1,3,4,9,12,13,16 . In 1 , the researchers suggested a method of image watermarking that based on DST.…”

“…Priya et al 3 proposed a medical image watermarking using Integer Wavelet Transform (IWT). A cover image is transformed using IWT into four sub-bands and the low frequency sub-band is interpolated using neighbor nearest interpolation.…”

“…Nowadays, millions of users are able to transmit the digital media through the internet easily. This feature of the internet leads to a number of challenges and threats regarding the security of transmitted media contents such as (copyright protection, media authentication and integrity verification) [1][2][3][4] . Therefore, data hiding and cryptography methods are to be the essential requirements for protecting the contents of digital media 3 .…”

“…This feature of the internet leads to a number of challenges and threats regarding the security of transmitted media contents such as (copyright protection, media authentication and integrity verification) [1][2][3][4] . Therefore, data hiding and cryptography methods are to be the essential requirements for protecting the contents of digital media 3 . Data hiding methods perform the security for the digital media by embedding a secret data in another digital media called a cover media 5 .…”

“…Data hiding approaches can be divided into two main methods, namely steganography and watermarking 3 . Steganography is similar to watermarking in general concept of data hiding.…”