...印,人类视觉系统,JPEG量化,离散余弦变换 [gap=1551]Keywords digital watermark, human visual system (HVS), JPEG quantization, discrete cosine transformation (DCT) ..
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Next, it modified the standard JPEG quantization table for the purpose of accommodating more secret messages.
接着修改了JPEG标准量化表以便能够嵌入较多的信息；
This paper mainly presents some improvements on computing discrete cosine transforms (DCT) and quantization part in the standard of JPEG image processing.
主要对JPEG图像压缩标准中的DCT变换和量化部分提出了一些改进意见。
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