GEOMETRIC CALIBRATION OF THE HASSELBLAD H3D MEDIUM FORMAT CAMERA
The Hasselblad H3D digital camera, which is designed for professional studio shootings, is equipped with a 39 megapixel digital back. It would be desirable to use this very high geometric resolution in photogrammetric applications. Unfortunately, the digital back does not have a tight connection to the camera body. In addition, the unknown internal image processing algorithms and the autofocus lens make it difficult to obtain a reliable camera calibration. In this paper, we investigate whether the Hasselblad H3D camera can be calibrated for use in photogrammetric applications. Repeated calibrations were performed using a 2D (planar) target as well as a 3D test field. Results of the individual calibration projects are compared in order to analyze the stability of the camera over time. We also investigate if there is a fixed pattern of systematic image residuals (after removal of radial distortion), which could be described by a distortion grid. Software tools were developed for semi-automatic calibration using the MATLAB programming environment. This calibration software consists of a graphical user interface supporting automated and precise measurement of circular point targets, robust calculation of initial orientation parameters and bundle adjustment with self-calibration capabilities. The commercial software package PhotoModeler (Eos Systems Inc./Vancouver) was also used for comparison to derive calibration parameters based on the planar target.
Photogrammetry Digital Camera Calibration Close Range Aerial
A.Fauner R.Ladstadter V.Kaufmann
Institute of Remote Sensing and Photogrammetry, Graz University of Technology, Austria
国际会议
北京
英文
1003-1008
2008-07-03（万方平台首次上网日期，不代表论文的发表时间）