期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2006
卷号：16
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：In contrast with traditional,analog photographic techniques,digital cameras are a cheap and quick way to take digital images of a object in natural colors. Such images,after a resampling and mosaicing process,and after final edition,compose the photogrammetric documentation in the form of colour digital photomaps. The quality of digital documentation depends on an object’s resolution of images,which should provide registration of every smallest object’s detail. For paintings on walls,it was assumed that the local pixel should not exceed 1mm. In consequence,generating digital photoplans of large area frescos often requires the taking of many pictures by digital camera. Elaborating digital developments requires knowledge of the geometrical parameters of the painting’s surface and also both the image’s and object’s coordinates of a large number of corresponding points. Resampling is done using polynomial or finite element transformation. The easiest way to obtain a sufficient number of corresponding points and geometrical parameters of a cylindrical vault is a stereoscopic measurement of its area. Elaborating a high number of stereopairs of digital images requires a calibrated digital camera and terrain survey of a large number of control points,or adjustment of a terratriangulation net. To make the processing less laborious,we suggest a method in which both greyscale pictures made with large-format photogrammetric camera and colour images taken with a digital camera are used. The metric pictures are used for determining vault geometry as well as for measurement of corresponding points,which are necessary for colour digital images of high-resolution rectification.
其他摘要：Aparaty cyfrowe w przeciwieństwie do tradycyjnych,analogowych technik fotograficznych pozwalają szybko i tanio pozyskać cyfrowe obrazy w barwach naturalnych. Z takich obrazów po przetworzeniu,zmozaikowaniu i opracowaniu edycyjnym moŜna utworzyć dokumentac
关键词：architectural documentation;cylindrical vaults;digital photomap;development of fresco surface;digital camera;photogrammetric camera
