Efficiency Evaluation of Processed Photogrammetric Data Captured by GPS Digital Camera

Abstract

Abstract: Recent developments in the acquisition and processing of close range images is an aim of primary importance in photogrammetry and computer vision, for digital documentation and reconstruction of objects featuring different characteristics. This demand is increasing in various fields, such as Cultural Heritage, Computer Graphics, Robotic and many other. For this reason, the digital image–based technique has been extensively used to produce high quality 3D models of heritage sites and historical buildings for documentation and preservation purposes. The features of any 3D model are highly dependant on the use of that model and can be very variable in term of accuracy and time for their creation. In the current paper, a certain digital measuring scheme based on a GPS-enabled digital camera (RICOH Capilo 500SE) is thoroughly tested and investigated for its capability in 3D modeling, as a complementary research in the same field. A practical field experiment showed a positional accuracy reported by this system was about 0.42 m in the 3D coordinates of some selected object points on a photographed façade captured by this camera. This accuracy is optimistic since the taken images were processed with only one control point, as a saving tool in time and cost of data acquisition. Moreover, this digital system can be used as a Mobile Mapping System MMS in some applications under certain circumstances and precautions. As an overall evaluation, this combined digital system should be subjected to more researches for the time being and further modifications and enhancements in the future. Key words: Close range photogrammetry Heritage documentation GPS Digital camera