中文说明：数字水印系统的实现——基于DCT的鲁棒水印。图像中数字水印的嵌入，分块DCT反变换
English Description：
Implementation of digital watermarking system robust watermarking based on DCT. Digital watermark embedding in image, block DCT inverse transform
Implementation of digital watermarking system robust watermarking based on DCT
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中文说明：数字水印系统的实现——基于DCT的鲁棒水印。图像中数字水印的嵌入，分块DCT反变换
English Description：
Implementation of digital watermarking system robust watermarking based on DCT. Digital watermark embedding in image, block DCT inverse transform