Segmentation results of our method and the method of Liu et al. (2018). The first column shows the input image, and the second and third columns present the segmentation results of our method. The fourth and fifth columns show the segmentation results from the method of Liu et al. (2018). The red boxes and yellow boxes indicate that our method outperforms the method of Liu et al. (2018) significantly. The red boxes indicate that our method produces good segmentation results for complex-shaped MBPs, while the yellow boxes indicate that our method detects fewer misidentified MBPs than the method of Liu et al. (2018).