Indian Journal of Science and Technology

Abstract

Objective: In the advanced digital world, images are widely transmitted in many applications including health care. Robust blind watermarking is implemented for digital image content security and confidentiality. Statistical Analysis: The existing mechanism requires new benchmarking performance metric along with its response to the various attacks on digitally watermarked images. The proposed evaluation framework for image security using blind watermarking namely IS-BRW takes cover image along with secret image of varying resolution by applying different level of Fast Fourier Transformation (FFT) as well frequency, time, and wavelet transformation. The method adopts varying data embedding size of the watermark image. Findings: The efficiency of the IS-BW is estimated by measuring Peak-to-Signal-to-Noise (PSNR), Correlation Coefficient (CCR) and Bit Error Ratio (BER). A comparative analysis is done for various attacks which include JPEG compression, Median filter, Wiener filter, Gaussian filter, Image cropping, Image rotation and Image resize. The metric parameters evaluated before and after various attacks do not changes and it remains same which shows the efficiency of the proposed algorithm with other existing systems. Applications: The proposed system is more suitable in the healthcare system where it involves the transmission of scanned medical images over the internet which strictly prohibits the modifications.

Keywords: Digital Watermarking For Images, Image Security, Wavelet Transformation, Watermarking Attacks