Determination of the Interior Orientation Parameters of a Non-metric Digital Camera for Terrestrial Photogrammetric Applications

Ghana Mining Journal Pub Date : 2019-12-22 DOI:10.4314/GM.V19I2.1

N. Tagoe, S. Mantey

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引用次数: 5

Abstract

AbstractHigh cost of metric photogrammetric cameras has given rise to the utilisation of non-metric digital cameras to generate photogrammetric products in traditional close range or terrestrial photogrammetric applications. For precision photogrammetric applications, the internal metric characteristics of the camera, customarily known as the Interior Orientation Parameters, need to be determined and analysed. The derivation of these parameters is usually achieved by implementing a bundle adjustment with self-calibration procedure. The stability of the Interior Orientation Parameters is an issue in terms of accuracy in digital cameras since they are not built with photogrammetric applications in mind. This study utilised two photogrammetric software (i.e. Photo Modeler and Australis) to calibrate a non-metric digital camera to determine its Interior Orientation Parameters. The camera parameters were obtained using the two software and the Root Mean Square Errors (RMSE) calculated. It was observed that Australis gave a RMSE of 0.2435 and Photo Modeler gave 0.2335, implying that, the calibrated non-metric digital camera is suitable for high precision terrestrial photogrammetric projects. Keywords: Camera Calibration, Interior Orientation Parameters, Non-Metric Digital Camera

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陆地摄影测量用非公制数码相机内部定向参数的确定

在传统的近景或地面摄影测量应用中，由于公制摄影测量相机的高成本导致使用非公制数码相机来生成摄影测量产品。对于精密摄影测量应用，需要确定和分析相机的内部度量特性，通常称为内部定向参数。这些参数的推导通常是通过实现带有自校准程序的束平差来实现的。内部定向参数的稳定性是一个问题，就精度而言，在数码相机，因为他们不是建立与摄影测量应用的头脑。本研究利用两个摄影测量软件(即Photo Modeler和Australis)校准非公制数码相机，以确定其内部定向参数。使用这两种软件获得相机参数，并计算均方根误差(RMSE)。观察到Australis给出的RMSE为0.2435,Photo Modeler给出的RMSE为0.2335，这意味着校准后的非公制数码相机适用于高精度地面摄影测量项目。关键词:相机标定，内部定向参数，非公制数码相机

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Ghana Mining Journal

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