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Figure 2 – A representative vertical time slices through (a) seismic amplitude, (b) instantaneous envelope, e, (c) instantaneous phase, φ, displayed with pixel interpolation turned on, and (d) instantaneous phase with pixel interpolation turned off. Since the software does not know that instantaneous phase is cyclical, it incorrectly linearly interpolates values that fall between purple values near -180 degrees and purple values near +180 degrees to generate green values near 0 degrees. Turning interpolation off removes these display artifacts. The blue pick indicates the base of the Oligocene section corresponding to a trough. (Data courtesy of NZPM)
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Figure 2 – A representative vertical time slices through (a) seismic amplitude, (b) instantaneous envelope, e, (c) instantaneous phase, φ, displayed with pixel interpolation turned on, and (d) instantaneous phase with pixel interpolation turned off. Since the software does not know that instantaneous phase is cyclical, it incorrectly linearly interpolates values that fall between purple values near -180 degrees and purple values near +180 degrees to generate green values near 0 degrees. Turning interpolation off removes these display artifacts. The blue pick indicates the base of the Oligocene section corresponding to a trough. (Data courtesy of NZPM)