Abstract:
Quantum computing, with its ultra-high parallelism, offers new opportunities for image security, yet existing quantum image watermarking algorithms still suffer from limitations in embedding capacity and robustness. Environmental interference in quantum systems and noise attacks on watermarked carrier images can lead to quantum bit errors and information loss, further restricting the practical application of such algorithms. To address these challenges, this paper proposes a color and grayscale image watermarking algorithm based on calderbank-shor-steane (CSS) stabilizer codes, which achieves error correction capability while reducing qubit overhead. By extending binary watermark embedding to color and grayscale images, the algorithm gains improved versatility.