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：2004
卷号：XXXV Part B1
页码：59-62
出版社：Copernicus Publications
摘要：Little research has been performed to determine the quantitative effects of the geometric imprecision of scanned photographs in a photogrammetric production setting. While photogrammetric scanners are most commonly used to scan aerial photographs, desktop and graphic design scanners have also been applied. It is recognized that the precision of non-photogrammetric scanners is highly variable and their errors larger than those of photogrammetric units, but these values have seldom been quantified. In addition, the practical effect of these errors upon the photogrammetric solution has not received much study. A precision calibration plate was repeatedly scanned on photogrammetric and non-photogrammetric scanners to determine the vari- ability and magnitude of errors. These errors were plotted spatially to illustrate the inherent instability of non-photogrammetric scanners. These models of scan accuracy were then used to determine the effects of the random scan errors in a photogrammetric production environment. While appropriate for qualitative uses, ultimately it was observed that the characteristic unpredictability of the errors rendered this imagery unsuitable for quantitative applications. During the investigation a significant degree of consistency was observed in the non-photogrammetric scanners, i.e. the errors, though large, included a systematic component that did not vary through time and changing conditions. Therefore a small block was scanned in such a scanner and the imagery re-sampled using the calibration parameters. The results were compared with those ob- tained from the same block scanned in a photogrammetric scanner
