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![]() | Local seismic attributes | ![]() |
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In a linear algebra notation, the squared correlation coefficient
from equation 8 can be represented as a
product of two least-squares inverses
The local similarity attribute is useful for solving the problem of
multicomponent image registration. After an initial registration using
interpreter's ``nails'' (DeAngelo et al., 2004) or velocities from
seismic processing, a useful registration indicator is obtained by
squeezing and stretching the warped shear-wave image while measuring
its local similarity to the compressional image. Such a technique was
named residual scan and proposed by Fomel et al. (2005).
Figure
shows a residual scan for registration of
multicomponent images from Figure
. Identifying and
picking points of high local similarity enables multicomponent
registration with high-resolution accuracy. The registration result is
visualized in Figure
, which shows
interleaved traces from PP and SS images before and after
registration. The alignment of main seismic events is an indication of
successful registration.
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![]() | Local seismic attributes | ![]() |
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