Analysis and improvement of the dynamic watermarking scheme for quantum images using quantum wavelet transform
We investigate the dynamic watermarking scheme for quantum images using quantum wavelet transform (QWT) proposed by Song et al. (Quantum Inf Process 12(12):36893706, 2013). It is aimed to embed the watermark image into the wavelet coefficients of the quantum carrier image. However, in our opinion, the key procedures of the protocol are wrong. At last, a possible improvement strategy is presented.
quantum wavelet transform quantum computation quantum watermarking