《Table 1 Important calculation parameters for Marmousi model》

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《Wavelet packet envelope multi-scale full waveform inversion》

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Table 1 is the comparison of some important calculation parameters for the conventional FWI，Hilbert envelop FWI and wavelet packet envelope FWI.It shows that the inversion error for conventional FWI is1.46%，while the error for the Hilbert envelope FWI and the wavelet packet envelope are 1.23%and1.14%respectively.The inversion under different decomposition scale of wavelet packet envelope FWI is also tested.Results show that the inversion error decreases as the decomposition scale increases from 3 to4.This is because when the decomposition scale increased，the wavelet packet envelope can provide better low frequency information for full waveform inversion to rebuild the underground structure.