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IMAGE WATERMARKING USING 2-LEVEL DWT

Keywords: Image watermarking , 2-level DWT , Wavelet transform , Alpha Blending , MSE , PSNR.

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Abstract:

A novel multi resolution watermarking method has been introduced for digital images. The proposed method is based on 2-level discrete wavelet transform (DWT) and alpha blending technique. In this technique the insertion and extraction of the watermark in the grayscale cover image is found to be simpler than other transform techniques. We have successfully implemented the digital watermarking technique on digital images based on 2-level discrete wavelet transform and compared the performance of proposed method with 1-level DWT by using statistical parameters peak signal to noise ratio (PSNR) and mean square error (MSE).

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