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：2000
卷号：XXXIII Part B2
页码：119-124
出版社：Copernicus Publications
摘要：The principal innovations in the DSW500 compared to the DSW300 include a stroboscopic light source, smaller integrating sphere, lighter color wheel, and choices of computer platform (NT or Unix) and sensor (1.6 and 6.3 megapixel units as well as the 4.2). Roll film transport remains a popular option. Extensive software improvements are being made to accommodate these innovations. New strategies for multiple operating system optimization and code maintenance have been defined. Scan throughput and user interface evolve. Work continues on the challenges of dynamic range, noise, color rendition and dodging. User friendliness has joined high radiometric accuracy and geometric precision as a leading customer requirement. Great advances have been occasioned by the replacement of the mechanically shuttered, continuous light source of previous DSW models with a fully software controlled, flash illumination sequence generator. This unit's wide dynamic range and greater repeatability facilitate improvements in automation and radiometry. With the decreasing cost of computer memory, radiometric correction algorithms that trade off memory for increased precision and advanced processing have appeared. The overall goal is automatically optimized, high signal-to-noise imagery that can be tonally adjusted to operator preferences. Dodging of the frame artifacts due to sun angle and aerial camera lens vignetting has been enhanced. "On-line" dodging performed on imagery acquired during a scan but before being saved to disk provides near real-time performance and higher image quality
关键词：Scanner; Design; Hardware; Software; Photogrammetry; Data Processing; Radiometric Qualities
