Digital Color Image Watermarking Using DWT & SVD & HD & ACM

This code is for invisible color digital image watermarking using a combination of three methods: DWT, SVD, HD, and ACM.

The internet facilitates the transmission of numerous images globally, necessitating robust security measures. This study addresses the limited research on embedding color watermarks in color images by combining DWT, HD, and SVD to develop robust blind watermarking schemes for color images. Four models (YCbCr, YCb, Y, and Cb) were evaluated based on their impact on imperceptibility and robustness. The watermark is embedded in YCbCr components, encrypted using Arnold Chaotic Map (ACM), and extracted blindly for authentication. Experimental results highlight the Cb scheme as the most effective, achieving a balance between robustness and imperceptibility, even under various attacks and watermark sizes, outperforming recent methods.