i would make things easier, if i could crop
my image frame exactly to to specific dimensions of
the 3d space/object, like a plane of 2000x1000 cm.
so that i get an image of 2000x1000 px and having the
plane boundaries aligned to the frame.
my scene allready uses the same ratio in the output with & height,
i set up a camera looking straight down onto the plane, now its
up to the y position of the camera and the focal length.
tried to look for logical values while playing arround with these
parameters and matching it by my eye, but nothing coming up..