Definition of digital close-range photogrammetry

It includes many branches, such as aerial photogrammetry, space photogrammetry and close-range photogrammetry.

The application of photogrammetry in industrial survey and engineering survey is generally called non-terrain photogrammetry. Among them, close-range photogrammetry refers to photogrammetry in which the measurement range is less than 100m and the camera is arranged near the object. It has experienced the transformation from analog, analysis to digital method, and its hardware has also developed from film camera to digital camera.

Digital close-range photogrammetry system is generally divided into single camera off-line measurement system and multi-camera on-line measurement system. This system, like other systems, has the characteristics of high precision, non-contact measurement and portability. In addition, it also has incomparable advantages over other systems: small workload, high speed, high efficiency, and is not easily disturbed by external factors such as temperature change and vibration. There are many foreign manufacturers and products, such as the V-STARS system of American GSI company, the Metronor system of Norwegian company, and the DPA-Pro system of German AICON 3D company.