We do orthogonal wavelet transform of a face image, get its four sub images of different frequency bands, then respectively extract their singular value features.
对人脸图象作正交小波变换，得到它在不同频带上的四个子图象，然后分别提取奇异值特征。
We do orthogonal wavelet transform of a face image, get its four sub images of different frequency bands, then respectively extract their singular value features.
对人脸图象作正交小波变换，得到它在不同频带上的四个子图象，然后分别提取奇异值特征。
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