A secure reversible color image watermarking scheme based on LBP, lagrange interpolation polynomial and weighted matrix.

Secure reversible watermarking schemes are essential for image authentication and tamper detection in medical, military and government applications. In this paper, a secure reversible color image watermarking scheme has been proposed considering the merits of three individual tools namely Local Binary Pattern (LBP), Lagrange Interpolation Polynomial (LIP) and Weighted Matrix (WM). The proposed reversible scheme has been designed to address the issues related to image authentication and tamper detection. Here, LBP operator is employed to generate Tamper Detection Code (TDC), LIP and WM are used to embed watermark within the sub-sampled images. Authentication is accomplished by utilizing an Authentication Code (AC), which is generated from binary string of watermark logo using a Secure Hash Algorithm (SHA-512). Repeated entry-wise-multiplication operations have been performed with each sub-sampled image block to increase the payload without affecting visual quality of the watermarked image significantly. Some standard NIST recommended steganalysis and attacks are conducted to evaluate its robustness and imperceptibility. It is observed that the developed scheme is secure and robust against several attacks as well as can detect tampered regions. Experimental results are compared with the state-of-the-art schemes to present the merits of our scheme. [ABSTRACT FROM AUTHOR]