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Precision evaluation of Forward Intersection method in Photogrammetry of Smartphone

• 1、School of Geography,Geomatics and Planning,Department of Surveying and Mapping Engineering,Jiangsu Normal University,Xuzhou,221000

Abstract：With the development of microelectronics integration technology, the performance of camera module integrated with smart phone has been improved, and it has been widely used in mobile payment, face recognition, intelligent transportation and other fields. However, the research and application in professional level photogrammetry has not been effectively concerned. Based on the camera module of Xiaomi 8, this paper evaluates the accuracy level of the application of smart phone in the front intersection of photogrammetry. The accuracy of the two experimental results is verified by using professional photogrammetry software Agisoft Photoscan, one is for the ink box front intersection experiment, the other is for a small bridge front intersection experiment. The ink box test results show that the precision of forward intersection is in millimeter level, the bridge test results show that the precision of horizontal direction is about 0.3m, and the precision of vertical direction is about 0.5m. The test results show that the camera module of smart phone has certain application potential in high-precision photogrammetry.

Keywords： Photogrammetry Camera module of Smartphone 3D modeling Accuracy assessment