CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
can apparently be estimated satisfactorily by means of such one- 
step single-image methods. 
Of course, a more conclusive evaluation requires further investi 
gations with various lenses, notably wide-angle, but also regard 
ing the limits of application of these approaches with respect to 
length and distribution of image line segments, noise and image 
rotations. The presented results, nonetheless, indicate in practi 
cal terms that these approaches do have the potential for camera 
calibration and, hence, the next steps of object reconstruction. 
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