Roadmap

- [x] MIOU [Multiscale IoU: A Metric for Evaluation of Salient Object Detection with Fine Structures](https://arxiv.org/pdf/2105.14572.pdf). Done at https://github.com/lartpang/PySODMetrics/commit/3baa40a165e668c026dcbac2bc457063afe65df4
- [x] Closer to the result of matlab code. At present, due to the difference between numpy and matlab, there are still some minor differences in the result.