Design and implementation of mobile measurement method for smartphone

doi:10.13474/j.cnki.11-2246.2019.0187

Abstract

Abstract:

In recent years, smartphones have gradually integrated a variety of sensors in the rapid development process, including position sensors, attitude sensors such as magnetometers, accelerometers and digital cameras. At the same time, the advantages of small size and low cost provide the possibility to realize mobile image measurement. A new type of smartphone image measurement method is proposed through the platform of Android system and multi-sensor integrated by smartphones. The method firstly calibrates the smartphone camera to obtain the inner orientation elements, and develops the Android application program which can obtain the position and posture data of the mobile phone while acquiring the image data. Secondly, extraction, matching of feature points and error point deletion are performed on the image data. According to the position and attitude data and the image coordinates of the homonymous points, the three-dimensional coordinates of the target point are calculated by space intersection. Finally, the results of space intersection is taken as the initial value and are overall optimized by the bundle adjustment. The experimental results show that the position information obtained by this method can achieve higher precision.

Key words: mobile measurement, smartphone, Android system, space intersection, bundle adjustment

CLC Number:

P237

JIANG Hemin, ZHONG Ruofei, XIE Donghai. Design and implementation of mobile measurement method for smartphone[J]. 测绘通报, 2019, 0(6): 71-76.

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