Sensor modelling and camera calibration for close range photogrammetry
Abstract Metric calibration is a critical prerequisite to the application of modern, mostly consumer grade digital cameras for close range photogrammetric measurement. This paper reviews aspects of sensor modelling and photogrammetric calibration, with attention being focussed on techniques of automated self calibration. Following an initial overview of the history and the state of the art, selected topics of current interest within calibration for close range photogrammetry are addressed. These include sensor modelling, with standard, extended and generic calibration models being summarised, along with non traditional camera systems. Self calibration via both targeted planar arrays and targetless scenes amenable to SfM based exterior orientation are then discussed, after which aspects of calibration and measurement accuracy are covered. Whereas camera self calibration is largely a mature technology, there is always scope for additional research to enhance the models and processes employed with the many camera systems nowadays utilised in close range photogrammetry.