Conclusions

We have introduced a general thresholding framework for IST algorithm. The only difference between half thresholding and conventional soft or hard thresholding is owing to the thresholding operator, so the percentile-thresholding strategy can be easily inserted into the half-thresholding algorithm. We compared four different types of thresholding strategies by using two synthetic examples and one field data example. The results show that apart from the threshold-setting convenience, the percentile thresholding also has the possibility for improving the recovery performance. Compared with soft thresholding, half thresholding tends to have a more precise reconstructed result.