Revisit Retinex Theory: Towards a Lightness-Aware Restorer for Underexposed Images

Table 2

Ablation study.

Settings	Metrics	Group A	Group B	Group C	All
No	CDIQA	3.3075	3.2836	3.0467	3.2126
	LOE	0.2475	0.2955	0.2407	0.2613
No	CDIQA	3.1739	3.1447	2.6133	2.9773
	LOE	0.0196	0.0214	0.0264	0.0225
No lightness-aware	CDIQA	3.2868	2.8166	2.3288	2.8107
	LOE	0.0269	0.0360	0.0435	0.0355
LiAR ()	CDIQA	3.2798	3.2750	2.7801	3.1116
	LOE	0.0324	0.0576	0.0569	0.0490