# A Study of Eye-Tracking Gaze Point Classification and Application Based on Conditional Random Field
## 4 Experimental Results and Analysis
### Real Scene Image Gaze Points Classification and Application
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & **1** & **2** & **3** & **4** & **5** & **6** \\ \hline \multirow{4}{*}{Clustering [10]} & _Ra_ & - & 81.87\% & 96.31\% & 91.34\% & 86.52\% & 84.17\% \\  & _Co_ & - & 61.23 & 56.86 & 44.11 & 37.13 & 43.62 \\  & _Precision_ & - & 93.62\% & 94.34\% & 96.68\% & 94.23\% & 96.51\% \\  & _Recall_ & - & 94.13\% & 94.25\% & 97.04\% & 93.96\% & 96.35\% \\  & _We_ & - & 93.97\% & 94.31\% & 96.79\% & 94.17\% & 96.42\% \\ \hline \multirow{4}{*}{SVM [11]} & _Ra_ & - & 63.58\% & 95.33\% & 91.26\% & 84.55\% & 80.74\% \\  & _Co_ & - & 30.21 & 56.27 & 43.91 & 33.23 & 39.42 \\  & _Precision_ & - & 93.65\% & 95.16\% & 96.37\% & 95.11\% & 95.63\% \\  & _Recall_ & - & 93.78\% & 95.35\% & 96.24\% & 94.97\% & 95.52\% \\  & _We_ & - & 93.71\% & 95.26\% & 96.32\% & 95.03\% & 95.58\% \\ \hline \multirow{4}{*}{RF [12]} & _Ra_ & - & 53.95\% & 74.62\% & 89.11\% & 83.46\% & 75.93\% \\  & _Co_ & - & 40.58 & 56.37 & 48.74 & 43.61 & 39.96 \\  & _Precision_ & - & 91.12\% & 92.24\% & 92.64\% & 91.39\% & 92.45\% \\  & _Recall_ & - & 92.33\% & 92.41\% & 91.58\% & 91.42\% & 92.58\% \\  & _We_ & - & 91.65\% & 92.37\% & 92.53\% & 91.40\% & 92.51\% \\ \hline \multirow{4}{*}{HMM [14]} & _Ra_ & - & 56.33\% & 63.86\% & 90.28\% & 80.24\% & 77.69\% \\  & _Co_ & - & 26.31 & 21.64 & 59.03 & 28.31 & 33.41 \\ \cline{1-1}  & _Precision_ & - & 94.95\% & 94.17\% & 95.38\% & 94.64\% & 96.72\% \\ \cline{1-1}  & _Recall_ & - & 94.77\% & 94.22\% & 95.42\% & 94.81\% & 96.78\% \\ \cline{1-1}  & _We_ & - & 94.81\% & 94.20\% & 95.40\% & 94.76\% & 96.75\% \\ \hline \multirow{4}{*}{GHMM [13]} & _Ra_ & - & 51.91\% & 64.23\% & 91.02\% & 79.36\% & 78.44\% \\  & _Co_ & - & 27.52 & 21.35 & 48.22 & 26.98 & 34.06 \\ \cline{1-1}  & _Precision_ & - & 93.88\% & 94.91\% & 95.64\% & 94.35\% & 95.99\% \\ \cline{1-1}  & _Recall_ & - & 94.97\% & 94.22\% & 95.69\% & 94.97\% & 96.84\% \\ \cline{1-1}  & _We_ & - & 94.63\% & 94.64\% & 95.67\% & 94.83\% & 96.63\% \\ \hline \multirow{4}{*}{CRF [16]} & _Ra_ & - & 53.16\% & 60.65\% & 91.64\% & 83.94\% & 80.73\% \\  & _Co_ & - & 22.93 & 17.52 & 42.97 & 26.82 & 29.46 \\ \cline{1-1}  & _Precision_ & - & 94.53\% & 95.32\% & 96.65\% & 96.01\% & 97.01\% \\ \cline{1-1}  & _Recall_ & - & 94.58\% & 95.29\% & 96.87\% & 96.44\% & 96.35\% \\ \cline{1-1}  & _We_ & - & 94.55\% & 95.30\% & 97.76\% & 96.23\% & 96.79\% \\ \hline \multirow{4}{*}{Proposed method} & _Ra_ & - & 51.91\% & 59.77\% & 91.34\% & 82.27\% & 79.83\% \\ \cline{1-1}  & _Co_ & - & 21.47 & 16.98 & 43.74 & 25.41 & 27.53 \\ \cline{1-1}  & _Precision_ & - & 95.33\% & 95.68\% & 97.21\% & 96.39\% & 98.15\% \\ \cline{1-1}  & _Recall_ & - & 95.78\% & 95.35\% & 97.19\% & 96.78\% & 98.17\% \\ \cline{1-1}  & _We_ & - & 95.69\% & 95.62\% & 97.21\% & 96.44\% & 98.16\% \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Comparison of real images gaze test evaluation results. center of the servo platform scene camera during the gaze test is recorded. When the blue \"+\" and green \"+\" overlap in the target center of the stable area, the servo platform visual aiming is achieved. Figure 18 shows the state of gaze point and servo platform scene camera following and visual aiming during gazing. Figure 18a is the gaze target, Figure 18b is the appearance of the first interference target, Figure 18c is the appearance of the second interference target. Figure 17: Test scene of the target center gaze. (**a**). Gazing target; (**b**). Interference target; (**c**). Interference target. Figure 18: Aiming process of target. (**a**). Aiming target; (**b**). The appearance of the first interference target when aiming; (**c**). The appearance of the second interference target when aiming. Figure 19 shows the distribution of gaze points in the experimental visual aiming process. Figure 19a is the distribution of gaze points of the original output, and Figure 19b is the distribution of gaze points after classification.