一幅图象经过小波变换后为HH、HL、LH、LL四个子带,在小波变换的其中一个子带即h3嵌入水印,LH3为低高频子带 -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
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