\chapter{Summary}
This thesis has described the theoretical background, hardware design and software architecture of the OptoFidelity Video Multimeter. The designed device functions as planned and is able to measure frame rate and dropped frames of video playback. Table \ref{tbl_project} presents some general statistics about the project.

\begin{table}[h]
\centering
\caption{Basic information of the project and device}
\label{tbl_project}
\begin{tabular}{lp{8cm}}
\toprule
Scope of project & Complete hardware and software design of a measurement instrument. \\
Purpose & Accurate measurement of timing characteristics of video playback.\\
Time frame & 9 months from initial planning to first software release.\\
\midrule
Work effort & \\
\hspace{1em} hardware design & 5 weeks \\
\hspace{1em} low-level software & 10 weeks \\
\hspace{1em} signal processing & 10 weeks \\
\hspace{1em} user interface & 5 weeks \\
\hspace{1em} documentation & 5 weeks \\
Lines of code & \\
\hspace{1em} low-level drivers & 2000 lines \\
\hspace{1em} signal processing & 3000 lines \\
\hspace{1em} user interface & 5000 lines \\
\hspace{1em} contributions to NuttX & 2000 lines, 107 patches \\
\midrule
Strengths & Accurate measurement, portable device, extensibility with new sensors and software. \\
Drawbacks & High design cost compared to sales volumes, demanding platform for software development. \\
\bottomrule
\end{tabular}
\end{table}

Overall, the development progressed rapidly and completing the device in just 9 months can be considered fast. However, even so the accumulated development costs are high, which can be problematic for a device with small sales volumes. In some points of the project further insight to the market conditions could have lead to better choices; for example, some other hardware design could have simplified the software development. Even if the cost of the hardware would have increased, up to a point it would be compensated by smaller development costs.

Nevertheless, the initial market interest has been promising and the potential is high due to the possibility of extending the device to perform various measurement tasks. Perhaps the most critical remaining problem is the difficulty of further software development. Because a large part of the software has real-time demands, it cannot be very abstract and performance characteristics have to be carefully thought out when implementing functionality. This leads to a highly demanding environment for software development, which consequently raises the time required and cost of features. One way to address this would have been to use faster hardware, allowing the software to be less efficient but still meet the speed requirements.

In conclusion, the project succeeded in producing a design that meets the needs, and is extensible for future demands. Further development depends on market requirements and financial aspects.
