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A novel watermarking scheme for quantum image is proposed based on Quantum cosine transform (QCT). The cosine coefficients are extracted by executing QCT on quantum image. A dynamic vector for controlling embedding strength instead of a fixed parameter for embedding process in other scheme is utilized to process quantum watermark. The adder operation and the inverse QCT are implemented which offset...
A flexible (2k, 2k) quantum image secret sharing (QISS) is proposed for the first time based on 1-qubit measurement scheme and the idea of strip. Through simple quantum measurements, a quantum image can be generated into 2k shares. When recovering the original secret image, strip operations which are proposed in quantum movie are applied on the shares and the secret image can be recovered in one piece...
A universal watermarking protocol for quantum images is designed in this paper. The protocol is developed based on quantum transform (QT) and quantum add operation (QAO). Moreover, a dynamic vector is introduced to control the embedding strength in the embedding process, which is obtained through the constraint that quantum image state should keep normalized in the entire computation process. Therefore,...
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