The target-oriented wave-equation inversion, regularized in the reflection angle, reduces the effect of the uneven illumination not only in the angle gathers but also in the stack image. It gives better results than the zero subsurface-offset inversion (Valenciano et al., 2006) because the regularization helps to spread the image from well illuminated to poorly illuminated reflection angles, reducing the noise and eliminating non consistent artifacts.
Results in Sigsbee data set show that even with very complex subsalt illumination the inversion can give a good image.
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