Praca Dyplomowa - Photogrammetry and Remote Sensing - AGH
Praca Dyplomowa - Photogrammetry and Remote Sensing - AGH
Praca Dyplomowa - Photogrammetry and Remote Sensing - AGH
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Where:<br />
T – depth of field<br />
R – the furthest sharply distance<br />
S – the nearest sharply distance<br />
u’ - circle of confusion<br />
THEORETICAL BACKGROUND<br />
Figure 2.2 Focusing <strong>and</strong> depth of field (Luhmann et al., 2006)<br />
2.2.4 Image scale <strong>and</strong> accuracy<br />
Scale of the image m is connected with distance to the object, principle distance <strong>and</strong> sensor<br />
size (image format).<br />
Where:<br />
h – object distance<br />
c – principle distance<br />
X – distance in object space<br />
x’- distance in image space<br />
In order to achieve sufficient accuracy <strong>and</strong> delectability of fine detail at the scene, the image<br />
scale M has to be defined appropriately with respect to the available imaging system <strong>and</strong> the<br />
exterior environmental conditions.<br />
10<br />
(2.1)<br />
Accuracy is connected to the image scale, because if the bigger scale, the more details are<br />
visible in the photo. What is more, configuration of the image may have influence on the<br />
accuracy, especially when it comes to Z direction. It is connected with height-to-base ratio<br />
(h/b) <strong>and</strong> if the cameras were situated parallel or convergent to each other. Also, generation of<br />
3D point cloud – resolution is dependent on image scale
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