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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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60 Z. <strong>Kuś</strong> and A. <strong>Nawrat</strong><br />

Fig. 2. Camera rotation angles as projection on a (x,y) plane<br />

Fig. 3. Camera rotation angles on a projection vertical plane S<br />

The direction of an axis z is a reference direction for def<strong>in</strong><strong>in</strong>g the camera rotation<br />

angle <strong>in</strong> a vertical plane (cf. fig. 3). It is assumed that the camera may rotate<br />

with<strong>in</strong> the range of 0 to 90 degrees. It denotes that 0°, 90°.<br />

The range of the camera rotation <strong>in</strong> vertical plane, as shown <strong>in</strong> figure 3, is sufficient<br />

regard<strong>in</strong>g the follow<strong>in</strong>g assumption: the first step comprises of sett<strong>in</strong>g the<br />

camera <strong>in</strong> an (x, y) plane towards an object which guarantees that <strong>in</strong><br />

the second step the camera is be<strong>in</strong>g set <strong>in</strong> a vertical plane towards the object.<br />

Figure 4 presents spatial distribution of the camera and object before and after<br />

distortion.

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