Fig. 6: Second-order reconstruction of the scene in Fig. 4a.

Panel sets (a, b, c, d), (e, f, g, h), and (i, j, k, l) correspond to threshold filter levels of 4σ, 5σ, and 6σ applied to the normalized image in Fig. 4b, respectively. Panels a, e, i correspond to the filtered first-order image, the second-order result including gray scale bars (b, f, j) and corresponding intensity distribution (c, g, k), and the combined first- and second-order masks (d, h, l) in black with the ground truth scene in red.