Close-range photogrammetry, as an important part of non-contact measurement, plays an important role in industrial manufacturing. This paper summarizes the basic principle of digital close-range industrial survey, introduces the structure and function of photogrammetric system, and focuses on the key techniques of photogrammetric technology, including the acquisition of high-quality images, central positioning of landmarks, camera calibration and automation technology, etc. Next has analyzed the current research direction of digital photogrammetry system and its application in different industrial fields. Finally, the demand of digital photogrammetry is summarized in the thesis, and put forward the development direction of close-range photogrammetry in large size and high precision, automation, specialized data analysis, etc.
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