A Novel Color Image Watermarking Scheme Based on DWT and QR Decomposition

Shaoli Jia; Qingpo Zhou; Hong Zhou

doi:10.6180/jase.2017.20.2.07

A Novel Color Image Watermarking Scheme Based on DWT and QR Decomposition

Shaoli Jia This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Qingpo Zhou¹ and Hong Zhou¹

¹School of Civil Engineering, Ludong University, Yantai 264025, P.R. China

Received: July 4, 2016
Accepted: January 12, 2017
Publication Date: June 1, 2017

Download Citation: ||https://doi.org/10.6180/jase.2017.20.2.07

ABSTRACT

A novel color image watermarking scheme based on DWT (Discrete Wavelet Transform) and QR decomposition is proposed to embed color watermark image into color host image. Firstly, the each component of the color host image is transformed by one-level DWT, and further divided to 44 non-overlapping pixel blocks. Then, each selected pixel block is decomposed by QR decomposition and the first row elements in the matrix R is quantified for embedding the watermark information. In the extraction procedure, the watermark can be extracted from the watermarked image without the requirement of the original host image or the original watermark image. Experimental results, compared with the related existing methods, show that the proposed color image scheme has stronger robustness against most common attacks such as image compression, filtering, cropping, noise adding etc.

Keywords: Color Image Watermark, Discrete Wavelet Transform, QR Decomposition, Blind Extraction

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