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：1992
卷号：XXIX Part B2
页码：358-363
出版社：Copernicus Publications
摘要：Photogrammetric scanning poses the highest requirements on geometric accuracy of scanners. Conventional film scanningdevices do not satisfy rigorous accuracy requirements in the conversion of metric photography to digital pixel arrays. Thereexists therefore the need for separate photogrammetric scanning devices. We describe a new product, the VX3000 precisionfilm scanner which is a device specifically designed to satisfy photogrammetric scanning needs at high accuracy. We expressthis in terms of pixel size and aim at a scanning accuracy of .±O.1 pixel.In order to accomplish this accuracy at reasonable cost, the VX3000 scanner avoids a kinematic scanning approach wherefilm and/or sensor dynamically move to assemble a large pixel array. Instead we employ a static square array CCD. Individualsquare windows of digital imagery are assembled into a large seamless pixel array with the help of an invisible calibrationgrid or reseau. Radiometric and geometric accuracy are the result of extensive calibrations by software; the product can bedenoted as software-leveraged hardware.
