====== Interior Orientation (IO) ======

The Interior Orientation establishes transformation parameters between the camera coordinate system and the image pixel coordinate system.\\  This is done by:

  * the measurement of the fiducial marks in the images expressed in the image pixel coordinate system.
  * availability of the fiducial mark coordinates expressed in the camera coordinate system, entered in the Camera Editor.

Remark on tiepoints:\\ \\  It is still possible to measure tiepoints without the Interior Orientation being defined.\\  It is however necessary to have the Interior Orientation defined, before you want to start a Bundle Adjustment procedure. \\  This is because the adjustment procedure uses the 'camera coordinates' of all the tiepoints, instead of it's image pixel coordinates.

{{adjustment_interior_orientation_menu.gif?419x176&nolink}}

See [[..:main:The_Adjustment_Menu#Interior Orientation|Interior Orientation]] on Strabo's 'Aerial Triangulation' Menu for editing the fiducial marks.