*3.2. Experiments of the Foreground Extraction Branch*

In this group of experiments, to evaluate the performance of the foreground extraction branch, the backbone was connected to the modified ASPP module only, and the proposed CCE loss function was utilized.

#### 3.2.1. Parameter Experiments of the CCE Loss Function

*γ* is an important component of the proposed CCE loss function in the foreground extraction branch. The value of *γ* was adjusted in a reasonable range, and the results obtained from different values are shown in Table 4.
