Caemras And Sensors Flashcards
1
Q
Two types of imaging sensors
A
Frame camera (one perspective center)
Pushbroom sensor(each scanline has it’sperspective center)
2
Q
Principle data aquisition tool/sonsor in photogrammetry
A
Aerial camera
3
Q
Aerial cameras are focused to infinity, why?
A
So that the objects on the ground beneath are viewed at a distance equal to the focal length of the cemera.
4
Q
Errors incured during aerial data aquisition
A
Tilt
Displacement
Relief displacement
Scale variation
Lens distortion
5
Q
Aerial frame camera xtics
A
6
Q
Camera calibration methods
A
Lab methods
Field methods
Stellar methods
7
Q
General approach of calibration
A
Photographing an array of targets whose relative positions are accirately known
8
Q
Lens distortion patterns
A
-Symmetric radial
-Decentering
-Combined symmetric radial and decentering
