# Edge-AI-Based Real-Time Automated License Plate Recognition System
## 3 Experimental Results
### Real-Time Image Testing of Proposed ER-ALPR System on Actual Roads
\begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Location/Time**} & \multirow{2}{*}{\begin{tabular}{c} **Number of** \\ **License Plates** \\ \end{tabular} } & \multicolumn{2}{c}{\begin{tabular}{c} **Proposed ER-ALPR System without** \\ **Logic Auxiliary Judgment** \\ \end{tabular} } & \multicolumn{2}{c}{**Proposed ER-ALPR System**} \\ \cline{3-6}  & & \begin{tabular}{c} **Number of Correctly** \\ **Recognized License** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Accuracy** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Number of Correctly** \\ **Recognized License** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Accuracy** \\ **Plates** \\ \end{tabular} \\ \hline \begin{tabular}{c} Zhongxing Road \\ 27 June 2021 7–8 A.M. \\ Zhongxing Road \\ 27 June 2021 0-1 p.m. \\ Zhongxing Road \\ 7 July 2021 8–9 A.M. \\ Zhongxing Road \\ 7 July 2021 6–7 P.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 200 & 195 & 97.5\% & 197 & 98.5\% \\ \hline \begin{tabular}{c} Zhongxing Road \\ 27 June 2021 7–8 A.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 238 & 230 & 96.6\% & 233 & 97.8\% \\ \hline \begin{tabular}{c} Zhongxing Road \\ 7 July 2021 8–9 A.M. \\ Zhongxing Road \\ 7 July 2021 6–7 P.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 69 & 67 & 97.1\% & 68 & 98.5\% \\ \hline \begin{tabular}{c} Zhongxing Road \\ 7 July 2021 6–7 P.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 104 & 100 & 96.1\% & 101 & 97.1\% \\ \hline \
\begin{tabular}{c} Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 74 & 70 & 94.5\% & 72 & 97.2\% \\ \hline
\begin{tabular}{c} Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 7 July 2021 8–9 P.M. \\ Zhongxing Road \\ 24 October 2021 0–1 A.M. \\ \end{tabular} & 221 & 212 & 95.9\% & 216 & 97.7\% \\ \hline \end{tabular}
\end{table} 
Table 4: Experimental results on real-world road data at six periods and one location. \begin{table}
\begin{tabular}{c c c c c c} \hline \multirow{2}{*}{**Location/Time**} & \multirow{2}{*}{\begin{tabular}{c} **Number of** \\ **License Plates** \\ \end{tabular} } & \multicolumn{2}{c}{\begin{tabular}{c} **Proposed ER-ALPR System without** \\ **Logic Auxiliary Judgment** \\ \end{tabular} } & \multicolumn{2}{c}{**Proposed ER-ALPR System**} \\ \cline{3-6}  & & \begin{tabular}{c} **Number of Correctly** \\ **Recognized License** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Accuracy** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Number of Correctly** \\ **Recognized License** \\ **Plates** \\ \end{tabular} & \begin{tabular}{c} **Accuracy** \\ **Plates** \\ \end{tabular} \\ \hline \
\begin{tabular}{c} Guangming Road \\ 28 June 2021 7–8 A.M. \\ Dayi Road \\ 27 June 2021 3–4 P.M. \\ Guangming Road \\ 27 June 2021 8–9 P.M. \\ Dayi Road \\ 27 June 2021 7–8 P.M. \\ \end{tabular} & 166 & 158 & 95.1\% & 160 & 96.3\% \\ \hline
\begin{tabular}{c} 27 July 2021 3–4 P.M. \\ Guangming Road \\ 27 June 2021 8–9 P.M. \\ Dayi Road \\ 27 June 2021 7–8 P.M. \\ \end{tabular} & 134 & 128 & 95.5\% & 129 & 96.2\% \\ \hline \end{tabular}
\end{table} 
Table 5: Experimental results on real-world road data at four periods and two locations. Figure 12 presents the real-time image recognition results obtained through the application of the proposed ER-ALPR system on actual roads. Figure 12a,e present the license plate recognition results obtained under daytime conditions, Figure 12b,f present the license plate recognition results obtained under nighttime conditions, Figure 12c,g present the license plate recognition results obtained under rainy daytime conditions, and Figure 12d,h present the license plate recognition results obtained under rainy nighttime conditions.