Embedded the watermark information into intermediate frequency in the DCT-based watermark algorithm. Improved the DCT transform speed by using FDCT instead of DCT. Quantized the frequency coefficients by using quantized table made from mentality visual threshold.

  • 在基于DCT的数字水印算法中利用FDCT变换实现DCT变换,大大提高了变换速度,为了得到中频系数采用了依据心理视觉阈值制作的量化表对频率域系数进行量化。

  • 互联网摘选 2025-01-20 17:20:24

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