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首页> 外文期刊>The Photogrammetric Record >CALIBRATION OF LONG FOCAL LENGTH CAMERAS IN CLOSE RANGE PHOTOGRAMMETRY
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CALIBRATION OF LONG FOCAL LENGTH CAMERAS IN CLOSE RANGE PHOTOGRAMMETRY

机译：近距离照相术中长焦距相机的校准

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摘要

One of the practical impediments to the adoption of long focal length lenses in close range photogrammetry is the difficulty in network exterior orientation and self-calibration that can be encountered with the collinearity equation model when the camera field of view is smaller than around 10°. This paper reports on an investigation that examined two different avenues for improving the self-calibration of long focal length cameras. The first is a re-examination of the linearisation of the collinearity equations with additional calibration parameters, and especially determination of the coefficients in the design matrix corresponding to the interior orientation elements. The second is a new approach to the calculation of object space coordinates by employing an orthogonal projection model that can be formulated as a bundle adjustment with self-calibration. Accuracy aspects of both approaches are discussed and test cases employing both zoom and macro lenses are presented.
机译：在近距离摄影测量中采用长焦距镜头的实际障碍之一是，当摄像机视场小于10°时，共线性方程模型可能会遇到网络外部定位和自校准的困难。本文报告了一项调查，该调查研究了两种改进长焦距相机自校准的途径。第一个是使用附加校准参数重新检查共线性方程的线性化，尤其是确定设计矩阵中与内部方向元素相对应的系数。第二种是通过采用正交投影模型来计算对象空间坐标的新方法，该模型可以表示为具有自校准功能的束调整。讨论了这两种方法的准确性，并介绍了使用变焦镜头和微距镜头的测试案例。

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