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：1998
卷号：XXXII Part 1
页码：20-25
出版社：Copernicus Publications
摘要：The· c~ntinuing progress in the resolution and quality of solid state matrix sensors has made the use of digital camerasonboard an aircraft an interesting option. Although by far not yet comparable to the resolution of scanned 9" x 9" film,direct digital data capture is meanwhile a viable alternative for a number of applications. Direct digital data captureavoids time consuming development and scanning processes and does yield a potential for online or even realtime dataprocessing. While first realizations of digital cameras onboard an aircraft were based on linear array sensors used in apushbroom principle, area sensors with resolutions of up to 4090x4096 pixels being commercially available today aregaining importance.This paper presents four practical studies on the helicopter-based use of high resolution digital stillvideo cameras foraerotriangulation and the automatic generation of digital elevation models and orthophotos. Test regions include mountainareas, an alpine village, the bottom of a shallow lake and a landslide area in Switzerland. The current performanceand future developments of solid state matrix sensors are shown, and the advantages and disadvantages of the use ofdigital cameras in aerial applications are discussed.Using self-calibration bundle adjustment techniques, externally verified accuracies of 2cm for planimetry coordinatesand 5cm for height coordinates were obtained in digital aerotriangulation using imagery of 1 : 18'000 scale; using1 : 64'000 small scale digital imagery over an area of 3.6 x 2.4 km2, a checkpoint rms of _14cm for planimetry coordinatesand 25cm for height coordinates was obtained. In the generation of digital elevation models by multi image featurebased matching, a precision of 0.03% of tb.e flying height above ground could be achieved
关键词：matrix camera; aerotriangulation; digital terrain model; calibration; accuracy
