Motion compensation
When motion compensation in the will Photogrammetry and technical photography the compensation meant those movements which (or the most important ones) have in common the objects captured. In the case of photographic recordings, this can be done, for example, by corresponding swiveling of the camera or a movable frame in the film plane ; in the case of digital cameras , this can also be done afterwards using image processing methods .
The oldest (and simplest) such method is the "trackable" equatorial or parallactic mounting of astronomical telescopes or astrographs . The tracking, which follows the apparent movements of the stars, takes place by rotating the optical system around an axis directed towards the celestial pole .
In satellite geodesy , the same thing has been done since the 1960s using multi-axis mounts that more or less follow the rapid track of the artificial earth satellite (see also Baker-Nunn camera ).
Newer motion compensation techniques also implement tracking through programmed tracking of the film stage or the CCD sensor - see also optical flow .
In aerial photography, motion compensation is also called FMC (Forward Motion Compensation).