中文说明：对图像进行非下采样小波变换，得到一个低频子带和若干个高频子带。
English Description：
A low-frequency subband and several high-frequency subbands are obtained by Nonsubsampled wavelet transform.
The image is transformed by non down sampling wavelet transform
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中文说明：对图像进行非下采样小波变换，得到一个低频子带和若干个高频子带。
English Description：
A low-frequency subband and several high-frequency subbands are obtained by Nonsubsampled wavelet transform.