A New Algorithm for Wavelet Watermarking Based on Linear Bit Expansion and Its Similarity Measurement

In this paper proposes a new wavelet watermark technique based on the linear bit expansion. To ensure the security of the watermark, enlarged watermark by applying linear bit expansion is inserted in a given intensity to a low frequency sub-band of the image which is wavelet transformed after the Arnold Transformation. Using F norm function to detect the presence of watermark is applied which is different from existing methods. The experimental results verify that the proposed watermarking technique has outstanding quality in regards to fidelity and robustness.