After wavelet transform, an image is divided into four sub bands: HH, HL, LH and LL. Watermark is em
2016-08-22
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an image after wavelet transform for HH, HL, LH, LL 4 subband. the wavelet transform of a subband that h3 embedded watermark, LH3 lower high-frequency band
matlab
其中
水印
嵌入
变换
经过
图象
HHHLLHLL
个子
LH
高频
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