科研之友
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摘要
Self-calibration plays a significant role in the automatic interior/exterior orientation of camera systems. This paper presents a new family of self-calibration additional parameters (APs) for digital airborne camera calibration. Photogrammetric self-calibration can (to a very large extent) be considered as a function approximation problem in mathematics. Based on the rigorous approximation theory, a new family of so-called Legendre self-calibration APs is developed from the orthogonal Legendre Polynomials. An approach is suggested to assess the full potential of in-situ camera calibration. The performance of Legendre APs is investigated in many field tests on the DMC, UltracamX, UltracamXp and DigiCAM camera systems. The external accuracy in the tests can reach 0.2 GSD and 0.4 GSD in horizontal and vertical dimensions, respectively. The posterior standard deviation estimation of image measurements is approx. 0.12 pixel or even less. The advantages of Legendre ill%26apos;s are illustrated over the conventional counterparts. From both the theoretical and practical views, Legendre ill%26apos;s are orthogonal, rigorous, flexible, and effective for calibrating frame-format airborne cameras.
- 出版日期2012-10
