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Table 2

Angular errors Erv,2D$ {E}_{{\mathbf{r}}_v,2D}$, Erv,3D$ {E}_{{\mathbf{r}}_v,3D}$, ErE,2D$ {E}_{{\mathbf{r}}_E,2D}$ and ErE,3D$ {E}_{{\mathbf{r}}_E,3D}$ for the tested rendering methods, averaged across 360 points on a ring (2D) or 2432 points on a sphere (3D), respectively. The standard deviations are given in parentheses.

Label N E r v , 2 D $ {E}_{{\mathbf{r}}_v,2D}$ E r v , 3 D $ {E}_{{\mathbf{r}}_v,3D}$ E r E , 2 D $ {E}_{{\mathbf{r}}_E,2D}$ E r E , 3 D $ {E}_{{\mathbf{r}}_E,3D}$
minimal 1 90.0 (52.0) 90.0 (39.1) 90.0 (52.0) 90.0 (39.1)
hoa2d 16 0.0 (0.0) 32.6 (21.6) 0.0 (0.0) 32.6 (21.6)
hoa2d_basic 16 0.0 (0.0) 32.6 (21.6) 0.0 (0.0) 32.6 (21.6)
hoa29_pinv 29 0.7 (0.4) 3.0 (3.4) 0.7 (0.2) 6.1 (6.8)
hoa29_allrad 29 0.2 (0.1) 0.6 (0.4) 1.7 (0.9) 4.7 (3.4)
nsp45 45 5.6 (3.3) 15.0 (8.6) 5.6 (3.3) 15.0 (8.6)
hoa45_allrad 45 0.5 (0.2) 0.7 (0.5) 3.0 (1.2) 4.8 (3.4)
vbap45 45 0.0 (0.0) 0.0 (0.0) 2.2 (1.0) 5.7 (3.5)

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