Hi !
i have done a “camera calibration” and retrieved now

the Rotation and Translation  Matrix (from world coordinate to camera
coordinate)
(== exterior orientation). i loaded this matrix into the modelviewmatrix. 
the interior orientation (camera coordinate to sensor coordinate), which
consists of:
a) the focal length of the camera f
b) the “image main point” (the point where to optical ray through the center
of
projection intersects the image plane perpendicular) (cx, cy)
c) scaling factors (for each axis) dx, dy (ratio “camera coord / sensor
coord”)
Now my question:
How do i have to generate the projectionmatrix (GL_PROJECTION) from the
parameters f, cx, cy, dx, dy ???