# Improving CNN Fish Detection and Classification with Tracking
## 4 Results  
On average, the recall improved significantly with the tracking in two directions (Table 3). In the following results, except for on Table 3, we will consider only the tracking in two directions and simply call it \"module\". On average, the F1-Score increased by about 7% going from CNN to CNN + Module in both directions, ranging from a 6.3% increase on _Etelis coruscans_ species to 38.7% on _Aprion virescens_ species (Table 4). This improvement mostly came from recall which increased by about 21.6% on average, with a standard deviation of 0.172, as well as a 11.3% increase on _Pristipmoides filamentosus_ species being the lowest increase and a 55.9% increase on _Aprion virescens_ species being the highest increase (Table 4). However, the decrease in precision for most species affected the F1-Score improvement as well, with _Etelis coruscans_ exhibiting a decrease of 8.7%, whereas _Pristipomoides filamentous_ only showed a decrease of 4.9%. _Aprion virescens_ had the highest decrease by 12.2%, but it did not affect its F1-Score much (Table 4). On classes that represented an important part of the sampling, such as _Pristipomoides filamentous_ (Table 1), the impact of our module was less, with the F1-Score increasing from 0.876 to 0.915. \begin{table}
\begin{tabular}{c c c c c c c} \hline \multirow{2}{*}{**Name**} & \multicolumn{2}{c}{**Precision**} & \multicolumn{2}{c}{**Recall**} & \multicolumn{2}{c}{**F1-Score**} \\ \cline{2-7}  & **CNN** & **CNN + Module** & **CNN** & **CNN + Module** & **CNN** & **CNN + Module** \\ \hline _Pristipomoides flavipinnis_ & \(1\) & 0.934 & 0.678 & 0.868 & 0.806 & 0.897 \\ \hline _Pristipomoides filamentensus_ & 0.993 & 0.944 & 0.799 & 0.889 & 0.876 & 0.915 \\ \hline _Aprion virescens_ & 0.98 & 0.86 & 0.322 & 0.502 & 0.45 & 0.624 \\ \hline _Etelis coruscans_ & 1 & 0.913 & 0.69 & 0.785 & 0.782 & 0.831 \\ \hline _Pristipomoides argyrogrammicus_ & 1 & 0.921 & 0.929 & 0.951 & 0.963 & 0.934 \\ \hline _Aphareus rutilans_ & 0.96 & 0.88 & 0.668 & 0.816 & 0.782 & 0.843 \\ \hline Total & 0.989 & 0.909 & 0.681 & 0.802 & 0.791 & 0.846 \\ \hline \end{tabular}
\end{table} 
Table 4: Average of results obtained from tracking using CNN only and CNN + Module in two directions. \begin{table}
\begin{tabular}{c c c c c c c} \hline \multirow{2}{*}{**Name**} & \multicolumn{2}{c}{**Precision**} & \multicolumn{2}{c}{**Recall**} & \multicolumn{2}{c}{**F1-Score**} \\ \cline{2-7}  & **CNN** & **CNN + Module** & **CNN** & **CNN + Module** & **CNN** & **CNN + Module** \\ \hline _Pristipomoides flavipinnis_ & 0.95 & 0.934 & 0.838 & 0.868 & 0.889 & 0.897 \\ \hline _Pristipomoides filamenttosus_ & 0.966 & 0.944 & 0.883 & 0.889 & 0.921 & 0.915 \\ \hline _Aprion virescens_ & 0.904 & 0.86 & 0.474 & 0.502 & 0.612 & 0.624 \\ \hline _Etelis coruscans_ & 0.956 & 0.913 & 0.775 & 0.785 & 0.84 & 0.831 \\ \hline _Pristipomoides argyrogrammicus_ & 0.935 & 0.921 & 0.94 & 0.951 & 0.937 & 0.934 \\ \hline _Aphareus rutilans_ & 0.911 & 0.88 & 0.774 & 0.816 & 0.834 & 0.843 \\ \hline Average & 0.937 & 0.934 & 0.781 & 0.868 & 0.844 & 0.846 \\ \hline \end{tabular}
\end{table} 
Table 3: Average results obtained from tracking using CNN + Module (“Module” below) and CNN + Module in two directions (“Module 2D” below).