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：2008
卷号：XXXVII Part B5
页码：315-320
出版社：Copernicus Publications
摘要：True-orthophotographs are now being widely used in some areas, proving already as very valuable documents even replacing maps being more complete, reliable and objective. But they are still hard to produce with enough quality for other uses and scales, such as in architecture and conservation. Most works in these fields are just approximate ortho-rectifications by single or multiple planes [1]. Some academic attempts to reach quality "true" orthophotos were made recently [2] [9] using a combination of laser scanner and images, but are still costly solutions lacking from the flexibility needed for field work. In this paper, a new practical technique and software to produce these architectural orthophotographs is presented, departing just from conventional digital photographs with no need for metric cameras or laser scanner, and for small projects, not even for topographical surveying. It is also intended to be easy to use for non-photogrammetrists, dramatically reducing the working time usually spent in other photogrammetry applications. This method requires very intensive calculations through a dedicated software development using GPU (Graphic Processing Unit), making easier and faster the production of high quality true-orthophotographs. The prototype was already tested producing some orthophotographs in a commercial environment and is being now developed as a compact software application making very easy to widely produce quality architectural orthoimages, that we feel can become a standard in heritage documentation soon
关键词：Orthoimage; Close Range; Photogrammetry; Architecture; Correlation; Calibration; Programming
