Unsupervised Image-Generation Enhanced Adaptation for Object Detection in Thermal Images

Table 2

Ablation study for each proposed component.

Image trans	Int-Inv^1	R-A^2	Bike	Car	Car_stop	Color_cone	Person	mAP
No	—		1.5	0.7	0.5	0	4.1	1.4
No	—	√	1.04	3.1	0.71	0.03	39.0	8.8
Gray			0.94	4.1	1.2	2.03	18.3	5.3
Gray	√		3.9	12.2	5.0	7.5	52.5	16.2
Gray		√	1.5	2.1	2.5	7.2	50.7	12.8
Gray	√	√	3.0	7.3	4.7	17.0	61.2	18.6
CycleGAN			12.8	16.4	3.5	4.0	26.1	12.6
CycleGAN	√		18.7	31.6	6.0	6.6	49.0	22.4
CycleGAN		√	13.3	14.4	6.3	7.3	41.5	16.6
CycleGAN	√	√	20.3	30.8	11.7	12.9	56.9	26.5

Note. ¹Int-Inv indicates intensity inversion; ²R-A means readaptation.