Yinnian Liu

To meet the measurement requirements for the precise assembly of support trusses during the spatial reconstruction of ultra-large-aperture optical systems, this paper presents a multi-sensor-assisted alignment deviation measurement system and a suitable global calibration method.

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1. Introduction For digital images, the dynamic range is the ratio between the maximum possible grey value and the minimum grey value of an image pixel, which can also be expressed as the difference between the two [1]. In real imaging, the background information, such as the sea and sky, often has a large temperature difference, while the temperature difference of the object to be imaged is relatively small. Thus, the imaging system provides poor detail information.