该水印算法基于二维离散傅立叶变换(2dft)。
This algorithm is based on two dimensional discrete Fourier transform (2dft).
研究了数字图像处理中两种最常用的算子——离散二维傅立叶变换和离散二维卷积，并给出了它们在RCA上的映射策略和映射过程。
Study two of the most important basic operations in digital image processing: 2-D Discrete Fourier Transform and 2-D Discrete Convolution Transform. Map them on RCA.
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