6/1/2023 0 Comments Racerender sync gopro![]() The results of the analyses will be critically discussed in the paper to highlight the great potentialities and the possibility to apply this methodology in the future for heritage preservation.Ĭonventional topographic maps are still important for many applications, such as land planning, but require frequent updates, which involve high costs and are not easy to accomplish. Finally, the output data have been compared with a survey method now well established in this field, such as laser scanning. Hence, the frames extracted from the video have been processed with different, both professional, economic, and user-friendly software tools, achieving several results. The focus is on indoor environment characterized by architectural value and on the data processing not only with professional photogrammetric application but also with cloud server-based system. ![]() The high-resolution videos captured by these tools, in fact, allow the selection of frames characterized by sufficient overlap, necessary for point cloud generation through Structure for Motion (SfM) processes. Attention is paid on the diffusion of action cameras, characterized by wide-angle lenses and 4K video shooting, with more and more affordable prices and on the elaboration of the data with photogrammetry software. The research work focuses on the growing of fast and low-cost data surveying methods (both in the acquisition and processing phases), to be used mainly as a support for the management and enhancement of architectural heritage. The system can be improved in several forms, through processing techniques, such as structure from motion, but without the incorporation of additional hardware. ![]() Tests carried out in a sparse urban environment have shown planimetric accuracy better than 40cm, appropriate for large scale mapping, such as 1:2000. Positions of observed objects, such as traffic signs, are derived from consecutive frames. Assuming the car moves in a horizontal plane and the camera has no significant tilts, the system is treated in planimetric terms, with camera axis azimuth derived from the vehicle trajectory. The precise time of individual frames is obtained from the camera GPS and positions are interpolated from the GNSS receiver. Within good observation conditions, without tall buildings, differential positioning (either RTK or PPK) provides the trajectory with accuracy of a few centimetres. Although the system can be dependent on the camera GPS positions only, it was developed to include a GNSS dual frequency receiver, carried inside the car, on the dashboard. This paper describes the implementation of a mobile mapping system, based on a GoPro Hero 5 camera mounted on the side rearview mirror of a car. That is the case of the very popular camera, Gopro Hero 5. Recent models include GPS, which can deliver position and time of individual images and video frames. Action cameras can operate in outdoor conditions, such as outside a car, and provide good quality imagery that can be exploited to collect geospatial data by photogrammetric means.
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