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what is the scaling function on wavelet in the matlab?

조회 수: 2 (최근 30일)
mohammad ahmadzade
mohammad ahmadzade 2017년 6월 12일
답변: Wayne King 2017년 6월 19일
1

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Wayne King
Wayne King 2017년 6월 19일
Hi Mohammad, I'm not sure this question is complete since you just wrote "1" in the body. The scaling function provides the low frequency (DC components) or very long scale representation of the signal (or image). Recall that a wavelet by definition has zero mean which means the Fourier transform at \omega = 0 (or whatever Fourier variable you like to use) is equal to zero. If you want to recover a DC shift in a signal or image, then you need the scaling function.

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