Table 1.

Operation of FFB module.

Process	Operation	Input	Output
Part one	Conv3 × 3	C × H × W	C × H × W
	element-wise Multi	C × H × W & C × 1 × 1	C × H × W
	Concat	C × H × W & C × H × W	2C × H × W
Part two	Gap	2C × H/2 × W/2	2C × 1 × 1
	Conv1 × 1	2C × 1 × 1	C × 1 × 1
	Up-sampling	2C × H/2 × W/2	2C × H × W
Connection	Concat	2C × H × W & 2C × H × W	4C × H × W
	Conv1 × 1	4C × H × W	C × H × W