期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 2
页码：417-422
出版社：Copernicus Publications
摘要：A digital image acquisition system for close-range photogrammetry is developed by integrating an optical camera, a digital camera back, a notepad computer, a storage battery, a tripod, a specially manufactured connection device and a SCSI data transfer cable. This system can acquire images for any object at high resolution of 6400 by 8000 pixels in true color mode. The system is practically used in terrestrial photogrammetry of a huge subsidence pit caused by underground mining. While acquiring the stereoscopic images, At least 7 wooden plates marked control points are laid out around the pit at approximately the same interval distance, and the three-dimensional coordinates of these control points are measured with GPS-RTK. The acquired stereo images are processed with DLT algorithm to calculate coordinates of detail points within the pit. Using these discrete points, the digital elevation model (DEM) of the pit is constructed with TIN. The DEM of original topography before mining is also constructed with TIN by digitizing the large-scale topographic maps. By overlapping these two TIN models of the subsidence, the parameters of the subsidence such as depth, area, and volume can be calculated. To verify the reliability of this system, the three-dimensional coordinates of some detail points are both surveyed with GPS-RTK and with digital close-range photogrammetry. The differences between these two groups of coordinates can give the precision index. The mean square error of horizontal coordinate is about 0.21 meter, and the mean square error of height is about 0.37 meter.
关键词：Digital Image; Close-Range; Terrestrial Photogrammetry; Digital Camera; Mining Subsidence; TIN
