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[Studies in Computational Intelligence 481] Artur Babiarz, Robert Bieda, Karol Jędrasiak, Aleksander Nawrat (auth.), Aleksander Nawrat, Zygmunt Kuś (eds.) - Vision Based Systemsfor UAV Applications (2013, Sprin

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130 S. Fraś et al.<br />

Fig. 7. Active branch of multiplex<strong>in</strong>g unit<br />

Description of sections marked <strong>in</strong> fig. 7:<br />

A – offset recovery system,<br />

B – voltage divider,<br />

C – operational amplifier, ga<strong>in</strong> G = 2,<br />

D – term<strong>in</strong>ators,<br />

E – offset elim<strong>in</strong>ation.<br />

Term<strong>in</strong>ation and offset recovery are implemented on each one of six video <strong>in</strong>puts,<br />

before signal would be forwarded through multiplexer. Amplifier, l<strong>in</strong>e term<strong>in</strong>ation<br />

and output capacitor used for offset elim<strong>in</strong>ation are placed follow<strong>in</strong>g multiplexer<br />

outputs.<br />

5 Software<br />

Software part of OVAD project consists particularly on creat<strong>in</strong>g an application<br />

used for real time video process<strong>in</strong>g, which ma<strong>in</strong> task is to comb<strong>in</strong>e adjacent video<br />

streams <strong>in</strong> a way that prevents spott<strong>in</strong>g fragment of panorama, where those<br />

streams are connected, and to provide communication between PC and microcontroller,<br />

which is located at multiplex<strong>in</strong>g unit. This communication is used to send<br />

<strong>in</strong>formation to multiplexer unit about cameras which are currently needed to be<br />

transmitted. Second part of software is microcontroller configuration, necessary<br />

for proper communication and <strong>in</strong>terpretation of control data acquired through<br />

CAN.

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