Digital Watermarking Based on Wavelet Transform and MATLAB Implementation

This paper presents a wavelet transform-based digital watermarking algorithm for image protection, implemented using MATLAB. The technique embeds watermark information into high-frequency sub-band texture regions of wavelet-transformed images, leveraging human visual system characteristics to ensure imperceptibility. Watermark extraction is performed using both watermarked and original images. Experimental results demonstrate excellent concealment properties and robust resistance against common image processing attacks.