Zhiqiu Xia, Xingyuan Wang, Mingxu Wang, Salahuddin Unar, Chunpeng Wang, Ying Liu, Xiaoxiao Li. Geometrically Invariant Color Medical Image Null-Watermarking Based on Precise Quaternion Polar Harmonic Fourier Moments. IEEE Access, 7:122544-122560, 2019. [doi]
Abstract is missing.