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

Figure 6

Results of pairwise comparison user study. The pairwise comparison was conducted between the result of LiAR and the result of one of the four competing methods. There are three bars in each pairwise comparison, which are the number of the votes for “our method,” “competitor,” and “no preference” from left to right. (a) Details visibility. (b) Visual naturalness. (c) Overall preference.

(a)

(b)

(c)