# CNN-Based Illumination Estimation with Semantic Information
## 3 Experimental Results and Evaluations
\begin{table}
\begin{tabular}{l c c c c c c c c c c c c} \hline \hline  & \multicolumn{8}{c}{**Statistics-Based**} & \multicolumn{8}{c}{**Learning-Based**} \\ \hline
**Method** & **GW** & **WP** & **SoG** & **GGW** & **GE1** & **GE2** & **LSR** & **PG** & **BF** & **SS** & **NIS** & **PN** \\ \hline Camera & \multicolumn{8}{c}{Mean Angular Error} \\ \hline Canon1 Ds & 5.16 & 7.99 & 3.81 & 3.16 & 3.45 & 3.47 & 3.43 & 6.13 & 3.58 & 3.21 & 4.18 & 3.18 \\ \hline Canon600D & 3.89 & 10.96 & 3.23 & 3.24 & 3.22 & 3.21 & 3.59 & 14.51 & 3.29 & 2.67 & 3.43 & 2.35 \\ \hline FujiXM1 & 4.16 & 10.20 & 3.56 & 3.42 & 3.13 & 3.12 & 3.31 & 8.59 & 3.98 & 2.99 & 4.05 & 3.10 \\ \hline NikonD5200 & 4.38 & 11.64 & 3.45 & 3.26 & 3.37 & 3.47 & 3.68 & 10.14 & 3.97 & 3.15 & 4.10 & 2.35 \\ \hline OlympicEPL6 & 3.44 & 9.78 & 3.16 & 3.08 & 3.02 & 2.84 & 3.22 & 6.52 & 3.75 & 2.86 & 3.22 & 2.47 \\ \hline LumixGX1 & 3.82 & 13.41 & 3.22 & 3.12 & 2.99 & 2.99 & 3.36 & 6.00 & 3.41 & 2.85 & 3.70 & 2.46 \\ \hline SamNX2000 & 3.90 & 11.97 & 3.17 & 3.22 & 3.09 & 3.18 & 3.84 & 7.74 & 3.98 & 2.94 & 3.66 & 2.32 \\ \hline SonyA57 & 4.59 & 9.91 & 3.67 & 3.20 & 3.35 & 3.36 & 3.45 & 5.27 & 3.50 & 3.06 & 3.45 & 2.33 \\ \hline Camera & \multicolumn{8}{c}{Median Angular Error} \\ \hline Canon1 Ds & 4.15 & 6.19 & 2.73 & 2.35 & 2.48 & 2.44 & 2.51 & 4.30 & 2.80 & 2.67 & 3.04 & 2.71 \\ \hline Canon600D & 2.88 & 12.44 & 2.58 & 2.28 & 2.07 & 2.29 & 2.72 & 14.83 & 2.35 & 2.03 & 2.46 & 2.19 \\ \hline FujiXM1 & 3.30 & 10.59 & 2.81 & 2.60 & 1.99 & 2.00 & 2.48 & 8.87 & 3.20 & 2.45 & 2.96 & 2.82 \\ \hline NikonD5200 & 3.39 & 11.67 & 2.56 & 2.31 & 2.22 & 2.19 & 2.83 & 10.32 & 3.10 & 2.26 & 2.40 & 1.92 \\ \hline OlympicEPL6 & 2.58 & 9.50 & 2.42 & 2.18 & 2.11 & 2.18 & 2.49 & 4.39 & 2.81 & 2.24 & 2.17 & 2.12 \\ \hline LumixGX1 & 3.06 & 18.00 & 2.30 & 2.23 & 2.16 & 2.04 & 2.48 & 4.74 & 2.41 & 2.22 & 2.28 & 1.42 \\ \hline SamNX2000 & 3.00 & 12.99 & 2.33 & 2.57 & 2.23 & 2.32 & 2.90 & 7.91 & 3.00 & 2.29 & 2.77 & 1.32 \\ \hline SonyA57 & 3.46 & 7.44 & 2.94 & 2.56 & 2.58 & 2.70 & 2.51 & 4.26 & 2.36 & 2.58 & 2.88 & 1.65 \\ \hline Camera & \multicolumn{8}{c}{Tri-mean error} \\ \hline Canon1 Ds & 4.46 & 6.98 & 3.06 & 2.50 & 2.74 & 2.70 & 2.81 & 4.81 & 2.97 & 2.79 & 3.30 & 2.69 \\ \hline Canon600D & 3.07 & 11.40 & 2.63 & 2.41 & 2.36 & 2.37 & 2.95 & 14.78 & 2.40 & 2.18 & 2.72 & 2.33 \\ \hline FujiXM1 & 3.40 & 10.25 & 2.93 & 2.72 & 2.26 & 2.27 & 2.65 & 8.64 & 3.33 & 2.55 & 3.06 & 2.88 \\ \hline NikonD5200 & 3.59 & 11.53 & 2.74 & 2.49 & 2.52 & 2.58 & 3.03 & 10.25 & 3.36 & 2.49 & 2.77 & 1.95 \\ \hline OlympusEPL6 & 2.73 & 9.54 & 2.59 & 2.35 & 2.26 & 2.20 & 2.59 & 4.79 & 3.00 & 2.28 & 2.42 & 2.18 \\ \hline LumixGX1 & 3.15 & 14.98 & 2.48 & 2.45 & 2.25 & 2.26 & 2.78 & 4.98 & 2.58 & 2.37 & 2.67 & 1.81 \\ \hline SamNX2000 & 3.15 & 12.45 & 2.45 & 2.66 & 2.32 & 2.41 & 3.24 & 7.70 & 3.27 & 2.44 & 2.94 & 1.65 \\ \hline SonyA57 & 3.81 & 8.78 & 3.03 & 2.68 & 2.76 & 2.80 & 2.70 & 4.45 & 2.57 & 2.74 & 2.95 & 1.91 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Performance comparison between grey world (GW) [32], white patch (WP) [3], shades of grey (SoG) [4], general grey world (GGW) [6], 1 st-order grey edge (GE1) [6], 2 nd-order grey edge (GE2) [6], local surface reflectance statistics (LSR) [34], pixels-based Gamut (PG) [35], Bayesian framework (BF) [35], spatio-spectral statistics (SS) [37], natural image statistics (NIS) [20], and the proposed network (PN) with NUS dataset.