中文说明：基于光学傅里叶变换和小波变换的数字水印算法。首先将水印图像进行数字全息处理，然后对宿主图像进行小波变换，为了提高图像的峰值信噪比，较全息处理后水印图像置于宿主图像HH系数中。逆变换时，对含水印图像首先进行小波变换，然后取HH系数，进行反傅里叶变换，提取出水印图像。
English Description：
Digital watermarking algorithm based on optical Fourier transform and wavelet transform. Firstly, the watermark image is processed by digital holography, and then the host image is transformed by wavelet transform. In order to improve the peak signal-to-noise ratio of the image, the watermark image is placed in the HH coefficient of the host image. In the inverse transform, the watermark image is firstly transformed by wavelet transform, and then the HH coefficient is taken to carry out the inverse Fourier transform to extract the watermark image.