Fig. 7
From: Robust surface normal estimation via greedy sparse regression
Normal map of an ideal sphere recovered using various methods. a Ground truth normal map; b colour wheel and colour bar used for normal and angular error visualization, respectively. Angular error is measured in degrees. c,e, g, i, k, m Normal map recovered using LS, OMP, IRL1, SBL, LMS and LMS mode, respectively. d, f, h, j, l, n Angular error of normal maps recovered using the aforementioned methods