Automated metric calibration of colour digital cameras
Automated metric calibration of colour digital cameras
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DOI：
10.1111/j.1477-9730.2006.00380.x
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发表时间：
2006-12-01
影响因子：
2.4
通讯作者：
Hanley, Harry
中科院分区：
文献类型：
--
作者：
Cronk, Simon;Fraser, Clive;Hanley, Harry
消费级数码相机已经变得司空见惯，通过校准，它们在摄影测量应用中有很大的潜力。本文介绍了一种适用于彩色数码相机的相机自动标定方法。两项创新是这一发展过程的核心。第一个是在自动检测和识别编码目标的设计中利用RGB颜色属性。第二种是一种确定相对方位初值的新方法，该方法支持全自动的初始网外方位和随后的具有自标定功能的捆绑平差。本文还讨论了精度方面的问题，并讨论了色差的影响。最后，针对消费级数码相机的多种变焦设置，给出了一个在iWitness系统中实现的自动标定过程的实例。
Consumer-grade digital cameras have become commonplace and with calibration there is significant potential for their use in photogrammetric applications. This paper describes a new method for automatic camera calibration, which is suited to colour digital cameras. Two innovations are central to the developed process. The first is exploitation of RGB colour attributes in the design of automatically detected and identified coded targets. The second is a new approach to initial value determination for relative orientation, which then supports fully automatic initial network exterior orientation and subsequent bundle adjustment with self-calibration. Accuracy aspects are also touched upon and the impact of chromatic aberration is discussed. Finally, an example of the automatic calibration process, which is implemented in the iWitness system, is presented for the case of multiple zoom settings of a consumer-grade digital camera.