Hierarchical Watermarking Structure for Combined LSB and Wavelet Methods

In this study, we present a scheme that combines LSB (Least Significant Bit) DWT (Discrete Wavelet Transform) watermarking techniques. Data compression has rapidly evolved due to variable mobile terminals and the vast amount of images and video. It is necessary to prevent access to and maintain the confidentiality of data. LSB and wavelet watermarking methods have arisen to address this need. However, unlike the LSB insertion method, the proposed scheme is effective against several attacks. The scheme first inserts a watermark using LSB in a test image, and 3-level DWT decomposition is implemented for robustness and security. We measured the Mean Squared Error (MSE) and Peak Signal to Noise Ratio (PSNR) to validate the scheme and acquired reasonable results. This study highlights the hierarchical structure of the LSB and wavelet-based watermarking technique. Keyword-Digital watermarking, LSB, DWT, usage control