Image Analysis, Classification and Change Detection in Remote Sensing, 3rd Edition

Topographic correction 199

5.5.3 Camera models and RFM approximations

Equations (5.54) are very simple because they assume that the world

and

image coordinates coincide. But in order to apply them, one has first to

transform the world coordinate system to the satellite coordinate system.

This can be do ne in a straightforward way w ith the rotation and translation

transformatio ns intr oduced above. However, it requires accurate knowledge of

the altitude, orientation and detailed properties of the satellite imaging sys tem

at the time of the image acquisition (or, more precisely, during the acquisition,

since the la tter is never instantaneous). The