valencia@sep.stanford.edu, biondo@sep.stanford.edu

## ABSTRACTA target-oriented strategy can be applied to explicitly compute the wave-equation imaging Hessian. This approach allows us to study the characteristics of the Hessian for different acquisition and subsurface geometries (low illumination, faults, etc.). Results on the Sigsbee and the Marmousi model show that in complex areas, a diagonal approximation of the Hessian might be insufficient to obtain the correct position and amplitudes of the reflectors. |

- Introduction
- Linear least-squares inversion
- Target-oriented Hessian
- numerical examples
- Conclusions
- Acknowledgments
- REFERENCES
- About this document ...

10/23/2004