This section introduces custom TV (total variation) norm based constraint settings. When used in tandem with Adaptive Waveform Inversion this acts to penalise jumps and homogenise salt. It preserves key salt boundaries and suppresses spurious oscillation when building up blocks of salt.
Below shows a synthetic example with a starting model and target model. Results from conventional least-squares FWI are compared with AWI plus constraints.
AWI with spatial derivative constraints
Salt body recovered
Salt body wiped away
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